MCQ
Electrons which gets excited in $PS-I$ must replaced. These replacement ultimately come from
- A$ATP$
- ✓$H _{2} O$
- C$PS-II$
- D$NAD$
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$I.$ Receptor sites on sarcolemma
$II.$ Nerve impulse
$III.$ Release of $\mathrm{Ca} \hat{\imath}$
$IV.$ Acetylcholine release
$V.$ Shortening of sarcomere
$VI.$ Synaptic cleft
$VII.$ Spread of impulse over sarcolemma on T-tubule
The correct option is