How muscle gets excited about contraction?

1.	How muscle gets excited about contraction?
Answer» Excitation for Muscle Contraction: Nerve impulse promotes releasing of Neurotransmillar Acetylcholine the ends of the axon at Neuromuscular junction. This chemical changes permeability in the plasma membrane of muscle towards Na⁺ . Due to this, Na⁺ enters into the muscle cell and causes a change in charge (axon potential), which is +ve inside the plasma membrane. In normal condition, there is -ve charge inside the inner surface of the plasma membrane. This positive change is transferred on the whole plasma membrane of muscle and generates an action potential, which is known as Excitation state of muscles.

Answer»

Excitation for Muscle Contraction:

Nerve impulse promotes releasing of Neurotransmillar Acetylcholine the ends of the axon at Neuromuscular junction.
This chemical changes permeability in the plasma membrane of muscle towards Na⁺ .
Due to this, Na⁺ enters into the muscle cell and causes a change in charge (axon potential), which is +ve inside the plasma membrane.
In normal condition, there is -ve charge inside the inner surface of the plasma membrane.
This positive change is transferred on the whole plasma membrane of muscle and generates an action potential, which is known as Excitation state of muscles.

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