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  4. Which of the following is important for muscle contraction and nerve impulse transmission?

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Q. Which of the following is important for muscle contraction and nerve impulse transmission?

Rajasthan PMTRajasthan PMT 2008

Solution:

$ C{{a}^{2+}} $ is essential of muscle contraction, neutron-muscular functions and nerve impulse transmission. During nerve impulse transmission, as an impulse arrives at a synaptic knob, calcium ions $ (C{{a}^{2+}}) $ diffuse into the knobs from surrounding tissue fluid. $ C{{a}^{2+}} $ trigger a process in which numerous synaptic vesicles fuse with the membrane of the knob and the areas of fusion break down; releasing the contents of vesicles into the fluid of synaptic clefts.