B3.1.1 Nervous System

Question 1

What is the CNS a made up of

Answer 1

Brain and spinal cord

Question 2

Sensory neurone function

Answer 2

Carry electrical impulses from receptor cells to CNS

Question 3

Relay neurone function

Answer 3

Carry electrical impulses from sensory neurone to motor neurone

Question 4

Motor neurone function

Answer 4

Carry electrical impulses from CNS to effectors

Question 5

Outline steps involved in nervous reaction

Answer 5

Stimulus
Receptor cells
Sensory neurone
Spinal cord
Brain
Spinal cord
Motor neurone
Effector
Response

Question 6

How do effectors respond to stimuli

Answer 6

Muscles contract to cause movement
Glands secrete hormones

Question 7

Where are receptor cells found

Answer 7

Sense organs

Question 8

Functions of receptor

Answer 8

Detect stimuli and covert to electrical impulse

Question 9

What is the peripheral nervous system

Answer 9

The sensory and motor neurone that connect the CNS to the rest of the body

Question 10

How to distinguish between neurones

Answer 10

Sensory-Dendron on the left and nucleus in centre
Motor-Dendrites on the left nucleus on the left
Relay-Dendrites at bottom and irregular direction