When the supply of ATP in a muscle runs out, myosin heads remain detached from a

Question

When the supply of ATP in a muscle runs out, myosin heads remain detached from actin. _____ (True/False) Put following phases of a muscle twitch in the correct order. _____ a. period of contraction _____ b. latent period _____ c. period of relaxation Match the description of the stimulus applied to muscle fiber listed in column A with the corresponding definition listed in column B. Column A _____ 1. not strong enough to produce a muscle twitch _____ 2. strong enough to produce a muscle twitch but no summation _____ 3. stronger than necessary to cause summation Column B a. subthreshold b. suprathreshold c. threshold

Explanation / Answer

Ans 17 false

When there is adequate levels of ATP in muscle the myosin head is detached from the actin . Myosin head is then capable to hydrolyse ATP bind to actin and release inorganic phosphate. Im absence of ATP it will not detach itself feom actin.

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