Question

(2) Heart muscles are -
(a) Voluntary (b) Involuntary (c) both (d) none of these​

Answer 1

Answer:

heart muscle are involuntary which means that they work on their own and does not need the help of brain

Answer 2

Answer:

b) None of these ✔

Explanation:

There are three kinds of muscles:

Heart muscles:

• Heart muscles are cardiac muscles which are involuntary in function but there is a difference between involuntary muscle and cardiac muscles.
• They found only in the walls of the heart.
• The fibres of cardiac muscles are striated, uninucleated and branched.
• They are relatively short.
• They can contract without outside stimulation or encourage.
• They do not get tired soon.

Involuntary muscles:

• Inoluntary muscles are also called unstriated muscles.
• They are not under the control of our will.
• They are made up of spindle shaped cells which are uninucleated.
• They are found in the walls of intestine helping in the passage of food, skin, lining of blood vessels, urinary bladder, uterus etc.

Voluntary muscles:

• Stratified muscles are under the control of our will.
• They are made up of long fibres cells which are nucleated.
• These muscles move only when we want it to.
• These muscles are found in the arms, legs, face, neck, etc.

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