Question

Which of the following statements is/are correct?
i. Contraction of muscle is an active process.
ii. Relaxation of muscle is an active process.
iii. Calcium is stored in sarcoplasmic reticulum.

• A. Both i and ii
• B. Both i and iii
• C. Only iii
• D. Only i

Answer 1

The correct option is B Both i and iii

Contraction of muscles involve the use of energy which is chiefly provided by ATP. Hence, it is an active process.
Calcium is stored in the sarcoplasmic reticulum in the muscles. These calcium ions ultimately bring about the contraction of the muscle.