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Muscle Types and Functions

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Questions and Answers

What is the main function of muscles?

To synthesize proteins

To convert chemical energy into mechanical energy (correct)

To generate heat energy

To store glycogen

Which type of muscle is involved in the pumping action of blood in circulation?

Skeletal muscle

Cardiac muscle (correct)

Voluntary muscle

Smooth muscle

What is the functional unit of muscle?

Myofibril

Sarcomere (correct)

Muscle fiber

Muscle cell

What is the central region of the A-band in a sarcomere?

H-zone Signup and view all the answers

What is the characteristic feature of smooth muscles?

Nonstriated Signup and view all the answers

What percentage of muscle protein is composed of actin?

25% Signup and view all the answers

Which of the following is NOT a subunit of troponin?

Troponin D Signup and view all the answers

What is the function of Troponin C?

Is a calcium-binding protein Signup and view all the answers

What is the energy source for muscle contraction?

Hydrolysis of ATP Signup and view all the answers

What is the result of the binding of 4 Ca++ ions to troponin C?

Formation of cross-bridges between actin and myosin Signup and view all the answers