Tag: autonomic nervous system

Questions Related to autonomic nervous system

Cutaneous plexus and papillary plexus consist of

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

  1. A network of arteries providing dermal supply

  2. Network of nerves providing dermal sensation

  3. Specialized cells for cutaneous sensation

  4. Gland cells that release cutaneous secretion

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Correct Option: A
Explanation:
Cutaneous plexus is a network of arteries present along the border of hypodermis. These arteries supply blood to the fatty tissue of the hypodermis and deep parts of dermal layer including capillaries of hair follicles, sweat glands and sebaceous glands. Papillary plexus is another network of small arteries which supply blood to the dermal layer.
So, the correct answer is 'A network of arteries providing dermal supply'.

In EEG, the waves which are low in frequency but with high amplitude are

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

  1. Theta waves

  2. Delta waves

  3. Beta waves

  4. Alpha waves

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Correct Option: B

Choose the functions of sympathetic nervous system

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

  1. Constricts bronchi and pupil of eye

  2. Increases heart rate, relaxes bronchi

  3. Decreases heart rate, increases peristalsis

  4. Dilates blood vessels, stimulates salivary secretions

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Correct Option: B

Pneumotaxic centre which can moderate the function of respiratory rhythm centre is present at

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

  1. Pons

  2. Spinal cord

  3. Thalamus

  4. Right cerebral hemisphere

  5. Left cerebral hemisphere

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Correct Option: A

How many pairs of sympathetic ganglia are present in

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

  1. 10

  2. 12

  3. 22

  4. 31

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Correct Option: C

Additional parasympathetic ganglia occur in

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

  1. Head and neck

  2. Lateral chains

  3. Spinal cord

  4. All the above

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Correct Option: A

An interneuron consists of the following

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

  1. Long dendrites and short axon

  2. Short dendrites and long and short axon

  3. Short dendrites and a long axon

  4. Long dendrites and a long axon

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Correct Option: B

Which of the following pairs correctly identifies function of parasympathetic nervous system?

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

  1. Slows heart beat, promotes pancreatic secretion

  2. Increases secretion of sweat gland and intestinal gland

  3. Accelerates heart beat, dilates arteries

  4. Raises blood pressure, increases peristaltic activity.

Show answer
Correct Option: A
Explanation:
Parasympathetic Nervous system: It is active during relaxing times, restoring normal activity after stress.
Sympathetic Nervous system: Active during stressful conditions, preparing the body to face them.
A. It is the function of parasympathetic nervous system.
B. Increase secretion of sweat gland by sympathetic nervous system and promote secretion of intestinal juice by parasympathetic nervous system.
C. Accelerates heart beat by sympathetic nervous system and dilates arteries by parasympathetic nervous system.
D. Raises blood pressure by sympathetic nervous system and increases peristaltic activity by parasympathetic nervous system.
So, the correct answer is 'Slows heart beat, promotes pancreatic secretion'.

Which of the following is not an effect produced by parasympathetic stimulation?

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

  1. Pupil dilation

  2. Increased saliva

  3. Increased stomach activity

  4. Constriction of bronchi

Show answer
Correct Option: A
Explanation:

Dilation of the pupil is the function of the sympathetic nervous system. Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; decreased heart rate; salivation increase; peristalsis of the GI tract.

Which one feature is correctly described?

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

  1. Salivary glands - secretes saliva - replication

  2. Pupil of the eyes - dilate - constricts- regulates entry of light

  3. Heart rate - decreases - tachycardia

  4. Intestinal peristalsis - stimulates - inhibits - heart rate

Show answer
Correct Option: B
Explanation:

The pupil is a hole or opening in the middle of the iris. Iris is the coloured part of the eye that controls the amount of light entering the eye by adjusting the size of the pupil (contraction and dilation). Salivary glands are associated with digestion while intestinal peristalsis moves the food through the intestine. Tachycardia refers to the presence of faster heart beat. So, the correct answer is option B.