Question

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

• A. 1
• B. 2
• C. 3
• D. 4

Answer 1

Answer: (B)

2

Parasympathetic innervation leads to pupillary constriction. A circular muscle called as the sphincter pupillae accomplishes this task. Sympathetic innervation leads to pupillary dilation. Dilation is controlled by the dilator pupillae, a group of muscles in the peripheral 2/3 of the iris.