Topic 5

Question 1

Name the cells that detect stimuli (changes in the environment)

Answer 1

Receptors

Question 2

What is homeostasis?

Answer 2

The regulation of internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes

or

“Maintaining internal body conditions”

Question 3

Why is homeostasis important?

Answer 3

To maintain optimum conditions for enzymes and all cell functions.

Question 4

List three things that are controlled by homeostasis.

Answer 4

1) Blood glucose
2) Body Temperature
3) Water levels

Question 5

What is the gap between two neurones called?

Answer 5

Synapse

Question 6

What type of signal travels along neurones?

Answer 6

Electrical

Question 7

What type of signal is transmitted across a synapse?

Answer 7

Chemical

Question 8

1. What does CNS stand for?
2. What two organs make up the CNS?

Answer 8

1. Central nervous system
2. Brain and spinal cord

Question 9

Name the organ from the CNS that is not involved in a reflex response.

Answer 9

Brain

Question 10

List, in order, the neurones involved in a reflex response.

Answer 10

sensory neurone → relay neurone → motor neurone