Question

Which of the following is not an involuntary action?

• A. vomiting
• B. salivation
• C. heartbeat
• D. chewing

Answer 1

The correct option is D

chewing

The correct option is D.

Explanation of the correct option:

1. Involuntary actions are not under a person's control or will.
2. These actions always initiate when sense organs or receptors receive information.
3. Chewing is not an involuntary action as it is not under a person's control.

Explanations of the incorrect options:

Option A:

Vomiting is an involuntary action that is not in the control of a person.

Option B:

The formation of saliva is also an involuntary action.

Option C:

The heartbeat is an excellent example of involuntary action. One cannot stop a heartbeat, which means it is not under anyone's control.

Final Answer: Chewing is not an involuntary action.