Tag: autonomic nervous system

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Questions Related to autonomic nervous system

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Sympathetic nerves in mammals arise from

  1. Sacral region

  2. Cervical region

  3. Thoracolumbar region
  4. 3$^{rd}$, 7$^{th}$, 9$^{th}$ and 10$^{th}$ cranial nerves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Sympathetic nerves are composed of efferent fibres derived from the thoracic and lumbar regions of the spinal cord. It activates the involuntary action. It is also known as fight or flight. The post ganglion which originates from the sympathetic chain innervates the effector organ and effect it. So, the correct answer is option C.
Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Function of sympathetic nervous system is to

  1. Decrease heart beat

  2. Increase heart beat

  3. Contract respiratory organ

  4. Secrete saliva
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sympathetic nervous system deals with the response to stress and danger, releasing epinephrines (adrenaline), and in general, increasing activity and metabolic rate. So, due to sympathetic stimulation, heart rate increases, to provide body more and more oxygen and nutrients.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Alcohol affects

  1. Medulla oblongata

  2. Cerebellum

  3. Cerebral cortex

  4. Thalamus
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This question is ambiguous. Alcohol affects MULTIPLE brain regions - cerebral cortex (judgment, disinhibition), cerebellum (coordination, balance), and medulla (respiration at high doses). The claimed answer B (cerebellum) explains ataxia but not alcohol's primary effects. If the question means 'coordination', B is correct. If it means intoxication generally, cortex (C) is more accurate. Given the options, cerebellum is likely the intended answer for motor effects.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Which one of the following is the example of action of autonomous nervous system?

  1. Knee-jerk response

  2. Pupillary reflex

  3. Swallowing of food

  4. Peristalsis of the intestines
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Peristalsis of the intestines is the example of the action of the autonomous nervous system. The organs of our body (viscera), such as the heart, intestines and stomach, are regulated by a branch of the nervous system known as the autonomic nervous system. It consists of autonomic neurons that conduct impulses from the central nervous system (brain and/or spinal cord) to glands, smooth muscle and cardiac muscle. ANS neurons are responsible for regulating the secretions of certain glands (i.e., salivary glands) and the regulation of heart rate and peristalsis (contraction of smooth muscle in the digestive tract), among other functions. So, the correct answer is option D.

Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Production of gastro-intestinal secretions and movement soon after ingestion of food are brought about by

  1. Central nervous system

  2. Sympathetic nervous system

  3. Parasympathetic nervous system

  4. Peripheral nervous system
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The parasympathetic nervous system promotes digestive activities, including gastrointestinal secretions and peristalsis, following the ingestion of food.