HUMAN NUTRITION

Detailed explanation-1: -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-2: -Breathing is usually automatic, controlled subconsciously by the respiratory center at the base of the brain. Breathing continues during sleep and usually even when a person is unconscious. People can also control their breathing when they wish, for example during speech, singing, or voluntary breath holding.

Detailed explanation-3: -The brain stem sits beneath your cerebrum in front of your cerebellum. It connects the brain to the spinal cord and controls automatic functions such as breathing, digestion, heart rate and blood pressure.

Detailed explanation-4: -Involuntary action is the set of muscle movements that do not require thinking. But it is controlled by the brain for example beating the heartbeat. Actions that take place without the willingness of an individual are called involuntary actions. Example: Digestion, sneezing, heart beating, etc.