MEDICAL PHYSIOLOGY

Detailed explanation-1: -Vomiting, salivation and heartbeat are involuntary actions under the influence of the autonomic nervous system. These actions are not under the control of one’s will.

Detailed explanation-2: -Some functions are involuntarily performed, such as breathing, digestion, heart beating, eye reflexes, etc., but some involuntary actions have voluntary control to a certain extent – examples are breathing, salivation, deglutition (swallowing), defecation, micturition (urination) and others.

Detailed explanation-3: -So, the correct answer is ‘Chewing’

Detailed explanation-4: -Actions which take place without consciousness or willingness of an individual are called the involuntary action. Digestion, heart beating, sneezing, etc are few examples of involuntary actions. Both involuntary and voluntary actions are controlled by the same parts of the brain.

Detailed explanation-5: -The medulla oblongata is the rod-shaped part of the brain which is seen below the cerebrum, located near the cerebellum of the brain. It controls involuntary actions like heartbeat and breathing.