Question

Ca+2 from the extracellular fluid of which of the following target organ cells, enters the cell,...

Ca+2 from the extracellular fluid of which of the following target organ cells, enters the cell, in order for the muscles to contract
gastronemus
stomach
cardiac
a and b
b and c
Science   Anatomy-And-Physiology   
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Answer #1

Answer -B and C

In stomach(smooth) muscle cells ,the action potential triggers the influx of calcium ion through L-type channel present at plasma membrane where as in cardiac muscle, the action potential prompts the influx of calcium ion through T-tubule on membrane for muscle to contract

The gastrocnemius muscle cells present at back portion of the lower leg contributes in calf muscle.It is superficial muscle located beneath the skin and functions in plantar flexing controlled by brain.

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