Chapter1 (Q15) Answer all of the following questions.1. For each pair of terms, explain the relationship between the terms

a. Stimulant and depressant
b. Motor neuron and sensory neuron
C. Brain stem and diencephalon
d. Resting potential and action potential Answer
a. Stimulant is a drug which increases (stimulates) the activities of the nervous system.
Depressant is a drug which lowers (depress) the activities of the nervous

b. Sensory neuron is a neuron that gets information about what is going on system.
inside and outside of the body and brings that information into the brain or
the spinal cord.
Motor neuron is a neuron that gets information from the brain or spinal cord
and conveys commands to the effector organs such as muscles and glands.

C. Brain stem is a part of the brain that consists of midbrain, pons and medulla
oblongata.
Diencephalon is a part of the brain that consists of thalamus and
hypothalamus.

d. Resting potential is the state in which the neuron is not conducting a nerve
impulse.
Action potential is the state in which the neuron is conducting a nerve
impulse.
Action potential is a localised change in the resting membrane potential
between the inside and outside of the nerve fibre caused by a stimulus