Tag: autonomic nervous system

Questions Related to autonomic nervous system

Non chordates possess nerve chord.

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

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

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Correct Option: A
Explanation:

Based on the presence and absence of notochord animals are distinguished into chordates and non chordates. Nerve cord is ganglionated, double ventral and solid.

Sympathetic nerves in mammals arise from

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

  1. Sacral region

  2. Cervical region

  3. Thoracolumbar region

  4. 3$^{rd}$, 7$^{th}$, 9$^{th}$ and 10$^{th}$ cranial nerves

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Correct Option: C
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.

Parasympathetic nervous system

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

  1. Decreases heart beat

  2. Increases heart beat

  3. Starts heart beat

  4. Has no effect on heart beat.

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Correct Option: A

On stimulation, sympathetic nervous system

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

  1. Increases sweat secretion

  2. Increases tear secretion

  3. Decreases saliva

  4. All the above

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Correct Option: C

Function of sympathetic nervous system is to

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

  1. Decrease heart beat

  2. Increase heart beat

  3. Contract respiratory organ

  4. Secrete saliva

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Correct Option: B
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.

Alcohol affects

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

  1. Medulla oblongata

  2. Cerebellum

  3. Cerebral cortex

  4. Thalamus

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Correct Option: B

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

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

  1. Knee-jerk response

  2. Pupillary reflex

  3. Swallowing of food

  4. Peristalsis of the intestines

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Correct Option: D
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.

The number of pairs of cranial nerves in mammals that are purely sensory is

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

  1. One

  2. Two

  3. Three

  4. Five

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Correct Option: C

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

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

  1. Central nervous system

  2. Sympathetic nervous system

  3. Parasympathetic nervous system

  4. Peripheral nervous system

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Correct Option: C

Intellectual ability is controlled by 

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

  1. Frontal lobe

  2. Parietal lobe

  3. Temporal lobe

  4. Occipital lobe

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Correct Option: A