Question

Discuss involuntary and voluntary actions

Answer 1

Hint: Voluntary and involuntary actions are generally brought about by muscles. Some muscles in our body contract when we want them to contract and some work without our conscious will.

Complete answer:
Human body has more than 600 muscles. Muscles perform various useful functions and help us in doing everything in day-to-day life. Muscles are classified by various different methods, one of it is Depending upon the control, the muscles are classified into two types:
1. Voluntary muscle
2. Involuntary muscle.
1. Voluntary Muscle: Voluntary muscle is the muscle that is controlled by the will. Skeletal muscles are the voluntary muscles. For example, if we want to write something then our muscles in our arms and hands will contract accordingly so that we can write.
2. Involuntary Muscle: Muscles that cannot be controlled by the will is called involuntary muscle. Cardiac and smooth muscles are involuntary muscles. For example, our heart never stops beating.

Note: Depending upon the striations:
1. Striated muscles: Striated muscle is the muscle that has a large number of cross-striations (transverse lines). Skeletal muscle and cardiac muscle are striated muscles.
2. Non-striated muscles: Muscle which does not have cross-striations is called non-striated muscle. It is also called smooth muscle. They are present in walls of visceral organs.