Reflexes - Seneca

Question 1

What are the 3 types of neurone and what are their functions ?

Answer 1

There are three types of neurone (nerve cell):

The sensory neurone, which carries the signal in the form of an electrical impulse to the central nervous system (CNS).

The relay neurone (in the CNS) relays the electrical impulse from the sensory neurone to the appropriate motor neurone.

The motor neurone is another type of nerve cell that carries the electrical impulse from the CNS to an effector.

Question 2

Effector simple definition

Answer 2

Brings about an action in response to the change in the internal or external environment.

Question 3

Pathway of the reflex arc

Answer 3

Stimulus
Receptor
Sensory neurone
Relay neurone
Motor neurone
Effectors
Response

Question 4

Which part of a reflex arc carries the transmission to the CNS.

Answer 4

Sensory neurone