The generation of excitation-contraction coupling involves all the following events except _______.

Generation of nameplate potential

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Release of calcium from controls

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Formation of cross-linkages between actin and myosin

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Hydrolysis of ATP to ADP

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Solution

The correct option is C Release of calcium from controls
Excitation-contraction coupling involves the transformation of depolarizing events in the sarcolemma into the initiation of mechanical shortening of the myofibrils within the myofibre by calcium ion released from the terminal cisternae of the sarcoplasmic reticulum.
So, option B is the correct option.

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Excitation – contraction coupling involves all except:

What is the correct sequence of events in the cross bridge formation?

i. The power stroke

ii. Cross bridge formation

iii. Myosin head is activated by ATP

iv. Calcium released binds to the troponin unblocks the actin sites

v. Cross bridge detachment

vi. Reactivation of the myosin head

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