Home

These are involuntary muscles that cannot be controlled consciously brainly

What are muscles that you cannot control consciously

  1. These muscles are called involuntary muscles, because you cannot consciously control them. The most well-known of these muscles is the heart, but involuntary muscles control the digestive.
  2. utes ago Science Elementary School These are muscles that cannot be controlled 2 See answers Angelshyen is waiting for your help. Add your answer and earn points. DaphneModesto DaphneModest
  3. The muscles that do not require conscious control are called voluntary involuntary muscles - 3407211 1. Log in. Join now. 1. Log in. Join now. Ask your question. Ask your question. A9u0galeychrissko A9u0galeychrissko 04/11/2017 Health High School +5 pts. Answere
  4. 3. Our heart is the strongest muscle of our body. a. True b. False c. Maybe d none of the these 4. These are also known at involuntary muscles that we cannot control consciously. a Cardiac muscle b. Smooth muscles c. Skeletal muscles 5. These muscles are voluntary muscles that are consciously controlled to move bones. a Cardiac muscle b. Smooth.
  5. Muscles that move bones are called _____ because they are under conscious control; all other muscle tissue is called _____because it cannot be consciously controlled. answer= voluntary and involuntary. follow me . Explanation
  6. These and other automated processes in our bodies are helped along or controlled by what are called involuntary muscles. That means they do their job whether you think about them or not

These voluntary muscles are consciously controlled to move the bones - 6334000 solanaoutfits solanaoutfits 05.11.2020 Science Elementary School answered These voluntary muscles are consciously controlled to move the bones a)skeletal muscle b)smooth muscle c)cardiac muscle d)hard muscle 2 Get the Brainly Ap SKELETAL MUSCLE. Skeletal muscle, attached to bones, is responsible for skeletal movements. The peripheral portion of the central nervous system (CNS) controls the skeletal muscles. Thus, these muscles are under conscious, or voluntary, control. cliffffy4h and 31 more users found this answer helpful can be consciously controlled...muscles that you can control. tendons. tough, thick bands of tissue that attach muscles to bones approximately 600 of these are attached to bones - but can only pull the bones, not push them. Voluntary muscles are under conscious control while involuntary muscles cannot be consciously controlled. What is.

These are muscles that cannot be controlled - Brainly

The muscles that do not require conscious control are

These types of muscles are muscles you can not consciously control. involuntary muscles. Foods high in_____ build strong muscles. protein. Voluntary muscles are connected to bones by tough cords called_____, which are strong and do not stretch. tendons Definition. Voluntary muscles are the muscles that can be moved by the free will of the person and are almost always associated with the skeleton system. Involuntary muscles are the muscles that cannot be controlled by will or conscious and are often associated with organs that exhibit slow and regular contractions and relaxation. Also known as The muscle tissue that can be consciously controlled is: A. Smooth. B. Skeletal. Learn about these involuntary muscles and how they help with things like pumping blood and digesting food

1. Which of the following is the control - Brainly.p

  1. These are called involuntary muscles Involuntary muscles: muscles that cannot be controlled consciously. They work all day long even if you're not thinking about them. The heart is an involuntary muscle. It beats whether you think about it or not. Other involuntary muscles help the body digest food, move blood, breathe, and go to the bathroom
  2. The muscles are very important in aiding perform actions for example, it is because of the muscles one is able to lift an object. There are two specific types of muscles with different functions mainly the voluntary and the involuntary muscles. Voluntary muscles Involuntary muscles Simple Analogy Muscles that we can control Muscles that we cannot control Also known as Skeletal muscle Smooth.
  3. They can be controlled voluntarily. Cardiac muscles are found in the walls of the heart and move on an involuntary basis. Finally, smooth muscles are found in hollow organs such as your stomach and esophagus and are also able to be controlled only on an involuntary basis. These are not found in your heart
  4. These muscles are present in the organs and structures such as the stomach, intestines, bladder, bronchi, blood vessels, arrector pili (skin hair erection controller). Unlike voluntary muscles, these muscles act without conscious control in the human body and cannot be controlled willingly. Involuntary muscles are also known as smooth muscles
  5. Any muscles that are not consciously controlled? Asked by Wiki User. See Answer. Top Answer. Wiki User Answered 2009-12-14 21:19:05. Smooth and cardiac muscles. 0 0 1
  6. Voluntary muscles are ones that you have the ability to consciously control: Arms, legs, mouth, head movement, etc. Most of the major muscle groups used or movement and communication are voluntary.

These muscles help in the movements of substances through the organs. Cardiac Muscles: These muscles are found only in the heart, and are mainly responsible for pumping blood throughout the body. Let us learn in detail about the difference between voluntary and involuntary muscles to have a clear idea about the muscular system Involuntary Muscles: Involuntary muscles do not fatigue and they can work continuously. Conclusion. Voluntary and involuntary muscles are two components of the muscle tissue of the animal body. The skeletal muscles are considered as voluntary muscles, which are controlled consciously Chapter 13 Bones and Muscles. A body tissue that contracts or shortens, making body parts move. A body tissue that carries electrical messages back and forth between the brain and every other part of the body. Filters waste from the blood like urea, water, salt and proteins Smooth muscle cannot be controlled consciously and thus acts involuntarily. Where are the 3 types of muscles found? The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. What are the 4 types of muscle? Different types of muscle Voluntary muscles are muscles you have control over and involuntary muscles are muscles you don't have control over. An example of a voluntary muscle would be your biceps for picking things up. A involuntary muscle would be the muscles inside your..

Muscular tissue are calledbecause it cannotbe - brainly

muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that. Involuntary muscles are muscles controlled only by the brain. These cannot be controlled consciously. The pupils of the eye are an example of this as they contract quickly when the eye is exposed to bright light. Skeletal muscle is under conscious control and is, therefore, voluntary muscle These are involuntary muscles, meaning you can't consciously control them. The cardiac muscle is what keeps your heart ticking, allowing it to pump blood throughout your body. Cardiac muscle tissue is also involuntary and controlled by a combination of hormones, brain signals, and its own internal systems Make up the involuntary or visceral muscle that move internal organs. These muscles are controlled by the autonomic nervous system. Cardiac Muscle. is striated in appearance but is like smooth muscles in its action. It's movement cannot be consciously controlled. Origin Beginning. Connection of the muscle to a stationary bone. Insertion

What are muscles that you cannot control? - eNotes

Striated (skeletal) muscles are voluntary, meaning that they are consciously (voluntarily) controlled by motor neurons in the central and peripheral nervous systems (CNS and PNS). These muscles are attached to the skeleton either directly or indirectly. Each muscle is wrapped in fascia , which contains the muscle's nerve, blood, and lymph supply Your muscles are all about movement. Some of these muscles you control, like your skeletal muscles, while others are not under your control, like the cardiac and smooth muscles Like skeletal muscle, cardiac muscle is striated, but unlike skeletal muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle. It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks A voluntary muscle, often called a skeletal muscle, is one of three types of muscle in the body. Most voluntary muscles are used to move bones, though some, such as the muscles in the face, are used to create movements below the skin. Unlike cardiac or smooth muscle, these muscles can be controlled by the conscious mind Muscles that are under your conscious control are called voluntary muscles, while muscles that are not under your conscious control are called involuntary muscles. The three types of muscles in the body include skeletal muscle, smooth muscle, and cardiac muscle

Cardiac Muscle.Found only in the heart, cardiac muscle is responsible for pumping blood throughout the body.Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that. A microexpression is a facial expression that only lasts for a short moment. It is the innate result of a voluntary and an involuntary emotional response occurring simultaneously and conflicting with one another, and occurs when the amygdala responds appropriately to the stimuli that the individual experiences and the individual wishes to conceal this specific emotion 1) The movements can be controlled consciously. These movements are involuntary and cannot be controlled by our will. 2) They are associated and controlled voluntarily. They are under the control of an autonomic nervous system. 3) The skeletal muscles are involved in these type of movements. The involuntary smooth muscles and cardiac muscles. There are three kinds of muscles in the body. Skeletal muscles attach to bones and are responsible for movement = YOU control those. Smooth muscles on the walls of your organs and are under control by your nervous system. Cardiac muscle is your he.. The muscle system consists of about 650 muscles. These muscles are divided into two; the involuntary and the voluntary muscles. The voluntary muscles are muscles that we are able to control consciously. They involve basic body movements that you have control over; turning a book, blinking, getting up from the bed in the morning

these voluntary muscles are consciously controlled to move

  1. These muscles are controlled by our brain. If we want to flex our arm our brain sends a signal through our body telling our bicep to contract. Involuntary muscle. This type of muscle is not controlled consciously.It contracts without us thinking about it. For example blinking or breathing
  2. Other muscles, like those of the stomach wall, are not voluntarily controlled. They are controlled directly by regions deep within the brain, such as the hypothalamus. Thus, during digestion, the stomach contracts without our being aware of it. These involuntary contractions ensure that the alimentary bolus is digested, even while we sleep.
  3. 6. Muscles and the nervous system Humans are able to consciously control their skeletal muscles. When a person decides to move, neural signals are sent from the brain to the muscles. These neural signals tell the a muscle to contract. The neural cells that carry the neural signals to the muscle are called motor neurons
  4. Involuntary movements performed by most cardiac and smooth muscles are under control of the autonomic nervous system. These involuntary movements include muscular activity such as shivering. Shivering is the result of small contractile movements performed by skeletal muscles, which creates heat through energy expenditure and assists in.
  5. Involuntary muscles cannot be consciously controlled, as is the case with skeletal muscles. c. Voluntary muscles cannot be consciously controlled, as is the case with the movement of legs while walking. Involuntary muscles can be controlled by an individual's will, as is the case with muscles in the digestive system. d. Voluntary muscles can.
  6. The need for voluntary (skeletal) muscle is quite obvious: we must be able to decide when to move or not move our limbs and postural muscles, our eyes, our muscles of swallowing, our voluntary sphincters of urination and defecation, and so forth..

these voluntary muscle are consciously controlled to move

Skeletal muscles are voluntary as they are consciously controlled by our brain and the nervous system. The aim of the skeletal muscle is to maintain the body posture, therefore as the muscles are consciously controlled. We adjust out body posture by thinking about it. Smooth muscles are involuntary as the contractions are not consciously. Involuntary and voluntary muscles also appear differently when viewed under a microscope. Involuntary muscle, called smooth muscle, is located within blood vessels, digestive system and internal organs, with the exception of the heart. It looks sm.. -Cardiac Muscle- A cardiac muscle is only found in your heart. It is an involuntary muscle that you can not consciously control. When these muscles relax and contract, blood is pumped through the heart to vessels that send that send this blood to different places in your body Smooth muscles — sometimes also called involuntary muscles — are usually in sheets, or layers, with one layer of muscle behind the other. You can't control this type of muscle. Your brain and body tell these muscles what to do without you even thinking about it

The Muscular System Flashcards Quizle

Answer and Explanation: 1. Smooth muscle is referred to as involuntary because we do not have conscious control of it. In other words, things like churning actions performed by the stomach, or. 3 types of muscle: There are three types of muscle tissue. They are skeletal muscle, smooth muscle, and cardiac muscle. Both smooth and cardiac muscles are involuntary whereas skeletal is voluntary Skeletal muscles commonly called muscles, are organs of the vertebrate muscular system that are mostly attached by tendons to bones of the skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle tissue, and are often known as muscle fibers. The muscle tissue of a skeletal muscle is striated - having a striped appearance due to the arrangement of the.

ve to in giconscious orders for them to move - Brainly

- Involuntary muscle: muscle that cannot consciously control - Voluntary muscle: muscle that you can consciously control (when you think you want to move it, it moves) - There are three types of muscle: skeletal, smooth, and cardiac. - Cardiac muscle: the unique muscle found only in the heart (it is involuntary muscle) - Skeletal (striated. Flashcard Content Overview. There are different types of muscle tissue within your body. Some muscles you control consciously, like when you move your mouse to click through these lessons The difference between voluntary and involuntary muscles is that voluntary muscles are muscles that you can consciously control (e.g. biceps, deltoids, triceps). Most voluntary muscles move your bones around. Involuntary muscles are muscles that you cannot control consciously (e.g. heart, digestive system) Muscles are made up of elastic tissue. Inside the muscles are tens of thousands of small fibres. We have three different types of muscles in our body: The Cardiac, Smooth and Skeletal Muscles. Cardiac muscle is only found in the heart. It is an involuntary muscle because it cannot be controlled consciously and it never gets tired

Eye movement includes the voluntary or involuntary movement of the eyes, helping in acquiring, fixating and tracking visual stimuli. A special type of eye movement, rapid eye movement, occurs during REM sleep. The eyes are the visual organs of the human body, and move using a system of six muscles.The retina, a specialised type of tissue containing photoreceptors, senses light Like skeletal muscle, cardiac muscle is striated, but unlike skeletal muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle. The nervous system can speed up or slow down the heart rate, but the heart can also beat without nervous system input due to a set of cells called pacemaker cells that spontaneously.

Smooth, or involuntary, muscle is also made of fibers, but this type of muscle looks smooth, not striated. We can't consciously control our smooth muscles; rather, they're controlled by the nervous system automatically (which is why they're also called involuntary) Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle Involuntary, voluntary and skeletal muscle. There are three types of muscle in the body: smooth muscle - found in the internal organs and blood vessels - this is involuntary; cardiac muscle Cardiac Muscle. Found only in the heart, cardiac muscle is responsible for pumping blood throughout the body. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the. Smooth muscle, found in the walls of the hollow internal organs such as blood vessels, the gastrointestinal tract, bladder, and uterus, is under control of the autonomic nervous system. Smooth muscle cannot be controlled consciously and thus acts involuntarily. The non-striated (smooth) muscle cell is spindle-shaped and has one central nucleus Smooth muscle acts involuntarily and cannot be consciously controlled. Cardiac muscle. Located only in the heart, cardiac muscle pumps blood around the body. Cardiac muscle stimulates its own contractions that form our heartbeat. Signals from the nervous system control the rate of contraction. This type of muscle is strong and acts involuntarily

Skeletal muscles.docx - 1 Skeletal muscles are voluntary ..

As with skeletal muscle, cardiac muscle is striated; however it is not consciously controlled and so is classified as involuntary. Cardiac muscle can be further differentiated from skeletal muscle by the presence of intercalated discs that control the synchronized contraction of cardiac tissues The cardiac muscle is an involuntary muscle; it cannot be controlled consciously. Skeletal muscle is the only voluntary muscle tissue in the human body. It is controlled consciously. Every conscious, physical action that a person performs such as speaking and walking requires skeletal muscle. The skeletal muscle contracts to move parts of the.

This condition involves sustained involuntary muscle contractions with twisting, repetitive movements. Dystonia may affect the entire body (generalized dystonia) or one part of the body (focal dystonia). Functional movement disorder. This condition may resemble any of the movement disorders, but is not due to neurological disease. Huntington's. Examples of involuntary muscles, also known as smooth muscles, are the muscles of the urogenital tract, digestive tract, circulatory system and respiratory tract. Involuntary muscles are not controlled by the organism's will. Their actions are automatic and facilitated by the autonomic nervous system. The structure of an involuntary muscle cell. Involuntary muscles: Contrary to voluntary muscles, these muscles work involuntarily and are not under conscious control of our brain. They are non- striated and tapered with single nucleus. Due to the smooth appearance of these muscles, they are also called smooth muscles. The tissue of involuntary muscles look like a telephone cable Voluntary muscles or striated muscles are those which work according to the one's desire or are under control, whereas Involuntary muscles are not under one's control. Biceps muscles, respiratory, alimentary and urogenital tracts are the places where voluntary muscles are found, while abdominal muscles, locomotory muscles, middle ear muscles, Diaphragm are the examples of the involuntary. The functions carried by voluntary muscle cells is regulated by our own conscious control, e.g., movement of leg or arm by striated muscles. The involuntary muscles can not be controlled by our conscious (will). The actions of these muscles are controlled by the hypothalamus, e.g., cardiac muscles regulate the beating of heart

Overview. An involuntary movement occurs when you move your body in an uncontrollable and unintended way. These movements can be anything from quick, jerking tics to longer tremors and seizures - Involuntary muscle: muscle that cannot consciously control - Voluntary muscle: muscle that you can consciously control (when you think you want to move it, it moves) - There are three types of muscle: skeletal, smooth, and cardiac. - Cardiac muscle: the unique muscle found only in the heart (it is involuntary muscle) - Skeletal (striated.

Smooth muscle and cardiac muscles are both involuntary which means they aren't controlled consciously. The muscle contracts due to impulses sent by the central nervous system. The benefits of involuntary control of muscles the body is able to take care of vital functions without us having to try or think about it 3. Smooth Muscle - located in the Stomach, Esophagus, Bronchi, and in the walls of blood vessels, works without our conscious 4. Voluntary Muscle - these can be consciously moved and controlled, such as those in the arms and legs 5. Involuntary Muscle - these can not be consciously moved and controlled, such as those in the heart 6 These muscles can be controlled consciously . Involuntary These muscles can be controlled unconsciously . Skeletal Muscle tissue that is attached to. are controlled consciously by the planning areas in the brain. Most skeletal muscles are voluntary, but some, such as those used for swallowing and breath-ing, are involuntary (controlled without conscious thought). While you can actively and consciously affect these involuntary movements, you do not do so under normal conditions Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. While hormones and signals from the brain adjust the rate of contraction, cardiac muscle stimulates itself to contract. The natural pacemaker of the heart is made of cardiac muscle tissue that stimulates other cardiac muscle cells to contract

These muscles that control your bowel can be strengthened through exercise. While the internal anal sphincter is not under conscious control, the pelvic floor muscles that form an external band of muscle around the anus are readily strengthened through relatively simple exercises Skeletal muscles are under voluntary control, which means you consciously control what they do. Just about all body movement, from walking to nodding your head, is caused by skeletal muscle. Voluntary muscle definition, muscle whose action is normally controlled by an individual's will; mainly skeletal muscle, composed of parallel bundles of striated, multinucleate fibers. See more Part of the brain that controls muscle movement. The part of the brain that controls movement is the motor cortex and the cerebellum. The motor cortex is one of the parts of the telencephalon, which in turn is part of the brain. Its main function is to promote movement. Then, through it, we generate, maintain and finalize the movements Overview. The 3 types of muscle tissue are cardiac, smooth, and skeletal. Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control

This is about the voluntary control the brain has on muscles, movements like reflexes are excluded. Initiating a Movement The first thing we need is to know how movement is initiated Because most of its movements cannot be consciously controlled, Smooth Muscle is referred to as Involuntary Muscle. The contractions in Smooth Muscles move food through our digestive tract control the way blood flows through the circulatory system, and increase the size of the pupils of our eyes in bright light

Science Unit 3 Test Part 1: Biology Flashcards Quizle

Involuntary muscles such as the heart or smooth muscles in the gut and vascular system contract as a result of non-conscious brain activity or stimuli proceeding in the body to the muscle itself. Contractions, by muscle type For voluntary muscles, contraction occurs as a result of conscious effort originating in the brain. The brain send The cardiac muscle is unique in the sense that it can only be found in the heart. Also called the heart muscle, it is an involuntary muscle which means that it cannot be controlled by will. In fact, it is regulated by a specialized structure called the sinoatrial node that sends electrical impulses to stimulate contraction The cardiac muscle controls blood flow in the heart, while the smooth muscles move food and other substances along the gastrointestinal system. Of the three sets of muscles, the skeletal muscles are the only ones that are consciously controlled by the brain. This is because skeletally controlled movements such as walking are only necessary at. Involuntary muscle contractions are not consciously controlled and occurs in places like the digestive tract an in the walls of blood vessels. 3. Cardiac (heart) muscle: Cardiac muscle tissue contains short, branched, striated cells, with one nucleus at the center of each cell. Cardiac muscle cells within a fiber are joined to their neighbors. The cardiac muscle gives strength to the heart. Most muscles in the body are skeletal muscles. Skeletal muscles are attached to bones by tendons and when tightened or contracted, cause movement. These muscles are voluntary and are consciously controlled to move bones. Tendons, tough bands of connective tissue , connect muscles to bones

We don't need to be consciously aware to breathe. However, if you think about it, we also have the ability to hold our breath at will. This clearly shows that, although the muscles of the diaphragm are involuntary, they are an exception, in that they can also be voluntarily controlled. Therefore, they are affected by ALS as well Q. _____ muscles are those that you can control. You use these muscles when you perform an action such as throwing a ball or standing up. answer choices . Voluntary. Involuntary. Voluntary Q. Involuntary muscle (not under your conscious control); automatic/ works without trying or without thinking about it. answer choices. The Involuntary Muscle Groups. Of course, not every muscle is one that can be controlled consciously. Sometimes you have to rely on the movement of your body and its muscles working without any real thought or effort on your part. For these muscles, the action must be one that just happens. The heart and the lungs are two of the most common of.

An intercalated disc allows the cardiac muscle cells to contract in a wave-like pattern so that the heart can work as a pump. Similarly, does cardiac muscle have one or multiple nuclei? Like skeletal muscle, cardiac muscle is striated, but unlike skeletal muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle This control is automatic, involuntary and continuous. You do not have to consciously think about it. The respiratory center knows how to control the breathing rate and depth by the amount (or percent) of carbon dioxide, oxygen and acidosis in the arterial blood (Willmore and Costill, 2004) The 650 muscles in the body not only support movement — controlling walking, talking, sitting, standing, eating and other daily functions that people consciously perform — but also help to. However, all the muscles in our body can either be controlled by us consciously, or work on their own, without active commands. As a result, the three main categories of muscles are put into two main categories; voluntary muscles and involuntary muscles - depending on their control mechanisms

Difference Between Voluntary and Involuntary Muscles

  1. Muscle enables complex movements that are either voluntary—under conscious control—such as turning the pages of this book, or involuntary, such as the contraction of the heart or the peristalsis in the gut. To understand how muscle accomplishes these various activities, you need to know the physiology behind a muscle contraction
  2. The six muscles around each eye are unique because they are both voluntary and involuntary. The voluntary striated portion of the muscles, which allow you to look in different directions, can be consciously controlled just like the muscles in your arms or legs. The involuntary smooth portion of the muscles, which adjust the shape of your eye to.
  3. In these trials, the intricacies of natural foot placement during stair ascent and descent emerged before our eyes, without the patient consciously trying to move his bionic limb. Furthermore, we describe the first-ever system for closed-loop joint control with natural neural feedback of prosthetic joint torque, and show that this system.
  4. Cardiac Muscles: Hence the name, cardiac muscle is the muscle which the heart of any living creature uses. Cardiac Muscles are simultaneously moving and it is the strongest muscle in the body. The Cardiac Muscle is an involuntary muscle, meaning it cannot be controlled consciously. The cardiac muscle cells are the cell which makes up the heart.

Science Unit 3: Bones & Muscles Flashcards Quizle

muscle, cardiac muscle cannot be consciously controlled and is called involuntary muscle. It has one nucleus per cell, is branched, and is distinguished by the presence of intercalated disks. 3 Skeletal Muscle Fiber Structure Each skeletal muscle ber is a skeletal muscle cell. These cells are incredibly large, with diameters of up to 10 blood vessels. Because visceral muscle is controlled by the unconscious part of the brain, it is known as involuntary muscle—it cannot be directly controlled by the conscious mind. Cardiac Muscle. Cardiac muscle is found only in the heart. Cardiac muscle tissue cannot be controlled consciously, so it is an involuntary muscle. Skeletal Muscle