3.1 & 3.2 Nervous Systems / Endocrine System

Question 1

What’s a stimulus?

Answer 1

Change in environment

Question 2

What’re receptors?

Answer 2

Groups of cells that detect stimulus.

Question 3

What’re effectors?

Answer 3

Muscles or glands that respond to stimulus

Question 4

What do receptors detect?

Answer 4

They detect stimulus such as: light, chemical, pressure & heat.

Question 5

What do receptor cells do to the stimulus?

Answer 5

They change stimulus to electrical impulses to CNS.

Question 6

3 types of neurones?

Answer 6

1. Sensory neurones
2. Relay neurones
3. Motor neurones

Question 7

What’re sensory neurones?

Answer 7

Carry electrical impulses from receptor cells to CNS.

Question 8

What’re relay neurones?

Answer 8

Carry electrical impulses through the CNS. Connect sensory neurones to motor neurones.

Question 9

What’re motor neurones?

Answer 9

Carry electrical impulses from CNS to effectors.

Question 10

Flow diagram of nervous reaction:

Answer 10

Stimulus -> Receptor cells -> Sensory neurone -> Spinal Cord -> Motor neurones -> Effectors -> Muscles -> Effect