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Question
During muscle contraction, the correct sequence of events is:
(A) Binding of myosin head to exposed active site of actin forming the cross-bridge by utilising the energy from hydrolysis of ATP
(B) Binding of Ca++ with troponin of actin filaments and thereby removing the masking of active sites for myosin
(C) Releasing the ADP and Pi from myosin so it can go back to its relaxed state
(D) Release of acetylcholine at neuromuscular junction which generates action potential in the sarcolemma
During muscle contraction, the correct sequence of events is:
(A) Binding of myosin head to exposed active site of actin forming the cross-bridge by utilising the energy from hydrolysis of ATP
(B) Binding of Ca++ with troponin of actin filaments and thereby removing the masking of active sites for myosin
(C) Releasing the ADP and Pi from myosin so it can go back to its relaxed state
(D) Release of acetylcholine at neuromuscular junction which generates action potential in the sarcolemma
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Solution
The correct option is C D, B, A, C
The correct sequence is:
i) Release of acetylcholine at neuromuscular junction which generates action potential in the sarcolemma
ii) Binding of Ca++ with troponin of actin filaments and thereby removing the masking of active sites for myosin
iii) Binding of myosin head to exposed active site of actin forming the cross-bridge by utilising the energy from hydrolysis of ATP
iv) Releasing the ADP and Pi from myosin so it can go back to its relaxed state
The correct sequence is:
i) Release of acetylcholine at neuromuscular junction which generates action potential in the sarcolemma
ii) Binding of Ca++ with troponin of actin filaments and thereby removing the masking of active sites for myosin
iii) Binding of myosin head to exposed active site of actin forming the cross-bridge by utilising the energy from hydrolysis of ATP
iv) Releasing the ADP and Pi from myosin so it can go back to its relaxed state
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