Chapter 4 - Nervous Co-ordination

Question 1

Muscles are used for movement. Their contraction helps the body to…

Answer 1

• move away from dangerous stimuli and towards pleasant ones.

Question 2

The response to a stimuli is made by….

Answer 2

• an effector (effectors include glands and muscles)

Question 3

Stimuli are detected by special cells called….

Answer 3

• receptors e.g. Light receptors and temperature receptors

Sometimes the receptors are grouped together or form a part of organs, e.g. the eye and ear

Question 4

In some cases a response is made according to a certain stimulus. What co-ordinates the response?

Answer 4

• The CNS (central nervous system) co-ordinates the response. This consists of the brain and the spinal cord.

Question 5

What do glands do?

Answer 5

• glands make and release chemicals such as enzymes and hormones e.g. the hormone insulin is released after a meal when blood sugar rises.

Question 6

What’s the scientific word for a change in the environment?

Answer 6

• Stimuli (singular stimulus)