Homework Answers
The given diagram shows us the excitation contraction coupling mechanism. Here the synaptic vesicle releases Acetylcholine which is a neurotransmitter. The acetylcholine has its receptors respectively on which it binds and enters the muscular junction. This neurotransmitter now propagates towards the sarcolemma. This results in depolarisation and calcium ions are released from the sarcolemma. This ultimately brings troponin to action which is responsible for forming the actin myosin cross bridging,
The correct location in the diagram are as follows.
1st box- Nicotinic acetylcholine receptor
2nd box-Skeletal muscle voltage gated sodium channel
3rd box-Transverse tubule voltage gated calcium channel
4th box- Sarcoplasmic reticulum calcium release channel
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