Choose the functions of sympathetic nervous system.

Constricts bronchi and pupil of eye

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Increases heart rate and relaxes bronchi

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Decreases heart rate and increase peristalisis

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Dilates blood vessels and stimulates salivary secretions

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Solution

The correct option is B Increases heart rate and relaxes bronchi
Sympathetic nervous system's primary function is to stimulate the body's fight-or-flight response. It is constantly active at a basic level to maintain homeostasis.
Some of the functions of sympathetic nervous system accelerate heart rate, widen bronchial passages, decrease motility (movement) of the large intestine; constrict blood vessels; increase peristalsis in the oesophagus, cause pupillary dilation, perspiration and raise blood pressure.
Thus, the correct answer is option (B)

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Similar questions

The cardiac activity could be moderated by the autonomous neural system.
Tick the correct answer.
(a) The parasympathetic system stimulates heart rate and stroke volume
(b) The sympathetic system stimulates heart rate and stroke volume
(c) The parasympathetic system decrease the heart rate but increase stroke volume
(d) The sympathetic system decreases the heart rate but increases stroke volume

Q. Which of the following systems slows the heart rate, constricts the pupil and stimulates pancreatic activity during emergency conditions?

Q. Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features. Which one feature is correctly described?

	Feature	Sympathetic Nervous Sytem	Parasympathetic Nervous System
(a)	Salivary gland	Stimulates secretion	Inhibits secretion
(b)	Pupil of the eye	Dilate	Constricts
(c)	Heart rate	Decreases	Increases
(d)	Intestinal peristalsis	Stimulates	Inhibits

Q. Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features. which one feature is correctly matched?

	Feature	Sympathetic	Parasympathetic
1.	Salivary gland	stimulates	inhibits
2.	Pupil of the eye	dilates	constricts
3.	Heart rate	decreases	increases
4.	Intestinal peristalsis	stimulates	inhibits

Q. Statement 1: Parasympathetic neural system increases the rate of heart beat.
Statement 2: Sympathetic neural system decreases the rate of heart beat.

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