Question

Go through the following table comparing the effect of the sympathetic and parasympathetic nervous system. Which one is matched correctly?

	Features	Sympathetic nervous system	Parasympathetic nervous system
a.	Pupil of eye	Dilates	Constricts
b.	Heart rate	Decreases	Increases
c.	Intestinal peristalsis	Stimulate	Inhibits
d.	Salivary gland	Stimulate secretion	Inhibits secretion

A. a
B. b
C. c
D. d

Answer 1

Hint: The information from the organs is transmitted to the brain and there is vice-versa. The control over the reflex actions is controlled by the spinal cord. Afferent and efferent neurons make the peripheral system. Brain and spinal cord work in harmony to make the nervous system.

Step by step answer:The study of the brain is neurology. It consists of a study of the central nervous system, including the brain and spinal cord. The reflex actions occurring in/by our body are studies under this field. They make the sympathetic and non - sympathetic nervous system controlling the sensory and motor nerves. For example - the ramus communicans from that links between the spinal cord and sympathetic nerves which will connect to the ganglia. The sympathetic nervous system is the fight and flight system during danger. The parasympathetic nervous system is the one which inhibits the overworking of the body and makes the body calm and composed.. It is called the rest and digest system.
(a)Pupil of an eye – It dilates in the sympathetic system and constricts in the parasympathetic system.
(b)Heart rate – It increases in the sympathetic system while decreases in the parasympathetic system.
(c)Intestinal peristalsis – It is inhibited in the sympathetic system and stimulated in the parasympathetic system.
(d)Salivary gland – It is inhibited in the sympathetic system and increased in the parasympathetic system.
So the answer is option A

Note: There are billions of neurons in our body. They look different from each other. It forms the inner communication system of our body. The brain interprets the information from the organs and converts them into actions. A neuron is made up of antennae, axon and cell body.