MEDICAL PHYSIOLOGY

Detailed explanation-1: -Calcium is the essential for the muscle contraction as release of calcium ions from sarcoplasmic reticulum trigger the muscle contraction.

Detailed explanation-2: -Voltage-gated Na+ and K+ channels are responsible for the generation of action potentials in neurons and skeletal muscle cells. In the neuron, generation of an action potential produces the nerve impulse, whereas in the muscle cell it leads to the contraction of skeletal muscle.