Muscular System and Muscle Types

What is the function of smooth muscle in blood vessels and internal organs?

Regulate movements of materials within these structures

What is the function of cardiac muscle in the heart?

Regulate the heart beat

What is the function of skeletal muscles in maintaining posture and position?

Provide us with our posture and position

What is the function of sphincter muscles in regulating organ volume?

Play a role in regulating organ volume Signup and view all the answers

What is the function of muscles in generating heat?

Generate a great deal of heat Signup and view all the answers

What is the ability of muscle tissue to receive and respond to stimuli called?

Irritability Signup and view all the answers

What is the ability of a muscle to shorten and thicken when a sufficient stimulus is received called?

Contractility Signup and view all the answers

What is the ability of a muscle to return to its original shape after contraction or extension called?

Elasticity Signup and view all the answers

What is the involuntary resistance to passive stretch called?

Tonicity Signup and view all the answers

What is the role of muscles in communication?

By the activity of tongue we can communicate with each other Signup and view all the answers

What is the origin of the word 'muscle'?

The word 'muscle' is derived from the Latin 'musculus' which means a little mouse (mus). Signup and view all the answers

How many types of muscles are there based on striation?

There are two types of muscles based on striation: striated (skeletal and cardiac muscle) and non-striated (smooth muscle). Signup and view all the answers

What are the characteristics of skeletal muscles?

<ol> <li>Voluntary muscle with well-developed cross striation. 2. Individual muscle fibers are separated. 3. Muscle cell is multinucleated, long, and cylindrical. 4. Contains alternate light and dark bands. 5. Sarcomere and T tubules are characteristically present. 6. There are no syncytial bridges between muscle cells.</li> </ol> Signup and view all the answers

What are the characteristics of cardiac muscles?

<ol> <li>Involuntary muscle with cross striation. 2. Sarcomere and T tubules are characteristically present. 3. Cardiac muscle fibers have a single nucleus. 4. Muscle fibers are interconnected, but there are no protoplasmic bridges between cells. 5. Cardiac muscle is functionally syncytial. 6. Contracts rhythmically in the absence of external stimuli.</li> </ol> Signup and view all the answers

What are the types of muscles based on function?

There are two types of muscles based on function: voluntary (skeletal muscle) and involuntary (smooth and cardiac muscle). Signup and view all the answers

What is the basis for classifying muscles into striated and non-striated types?

Muscles are classified into striated and non-striated types based on the presence or absence of cross striations in the muscle fibers. Signup and view all the answers