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during a muscle contraction which of the following ions enter the muscle to generate an end...

during a muscle contraction which of the following ions enter the muscle to generate an end plate potential to initiate a musvle sction potential during a contraction?
k+ and Cl-
k+ and ca2+
na+ and k+
mg+2, na+
science   Anatomy-And-Physiology   
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Answer #1

Answer:

Na+ and K+

Explanation: End plate potential is generated when Na+ enters the cell causing release of Ca++ resulting in muscle contraction. Na+ is the major extracellular ion that move inside the cell during initiation of muscle contraction.

na+ is reponsile for depolarization while K+ is responsible for repolarization phase of action potential during contraction

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