Tag: divisions of nervous system

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

You are watching a horror movie and you notice that your heart is beating fast and mouth is dry. It is because of

  1. Fight and flight response

  2. Sympathetic nervous system

  3. Both A and B

  4. Autonomic nervous system

  5. Parasympathetic nervous system
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sympathetic nervous system mediates the fight or flight response, which causes physiological changes like increased heart rate and dry mouth during stressful situations like watching a horror movie.

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

The functions of our visceral organs are controlled by

  1. Sympathetic and somatic nervous system

  2. Sympathetic and parasympathetic nervous system

  3. Central and somatic nervous system

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The autonomic nervous system, consisting of the sympathetic and parasympathetic divisions, regulates the involuntary functions of visceral organs.

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

Which is not the effect of sympathetic nervous system

  1. Dilation of pupil

  2. Inhibition of peristalsis

  3. Elevation of blood pressure

  4. Stimulation of saliva secretion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stimulation of saliva secretion is a parasympathetic effect. The sympathetic nervous system typically inhibits salivary secretion, resulting in a dry mouth.

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

Cutaneous plexus and papillary plexus consist of

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology nervous system of man divisions of nervous system autonomic nervous system the human brain

Choose the functions of sympathetic nervous system

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The sympathetic nervous system increases heart rate and relaxes bronchial smooth muscle to facilitate increased oxygen intake during the fight or flight response.