Question

Contraction period for a skeletal muscle is

• A. 4 sec
• B. 0.04 sec
• C. 0.2 sec
• D. 20 sec

Answer 1

The correct option is A 4 sec

• When an impulse reaches the muscle fibres of a motor unit, it stimulates a reaction in each sarcomere between the actin and myosin filaments.
• This reaction results in the start of a contraction and the sliding filament theory. And the Contraction period for a skeletal muscle is 4 sec.

Hence, Contraction period for a skeletal muscle is 4 sec.
So, the correct answer is '4 sec'.