Question

A characteristic of skeletal muscle is_______________.

• A. Rapid contraction
• B. Voluntary
• C. Fatigued after some time
• D. All of the above

Answer 1

The correct option is D All of the above

Skeletal muscle is a form of striated muscle tissue which is under the control of the somatic nervous system; that is to say, it is voluntarily controlled.

Striated muscle gets tired after strenuous exercise after creatine phosphate stores are exhausted. During normal process, creatine phosphate is converted to creatine and phosphate is released to make one ATP from ADP. But when creatine stores are exhausted after strenuous exercise, then glucose undergoes glycolysis to form pyruvic acid which is then converted to lactic acid which gives rise to ATP and muscle need is fulfilled. But eventually lactic acid builds up in muscle and pH drops and muscle get fatigue.
Therefore, option D is correct.