question_answer

Given below are four statements A-D w.r.t. mechanism of muscle contraction. Choose from the options stating them as true (T) and false (F)

[a] The action potential in the sarcolemma is generated by release of calcium ions in the sarcoplasm.

[b] The globular head of meromyosin possesses ATPase enzyme activity which causes hydrolysis of ATP and the energy derived make myosin head bind to exposed active sites on actin.

[c] Cross bridge formation is followed by pulling the attached myosin filaments towards the centre of ?I? band.

[d] The breaking of cross bridge requires binding of new ATP at the myosin head.

ABCD

A) T T F T

B) F T F F

C) F T F T

D) T F F T