Co-ordinating System (1)

Question 1

In order to survive, all animals must be able to ____ to the environment. Humans have two co-ordinating systems which enable them to do this.

Answer 1

Respond

Question 2

Define co-ordinating.

Answer 2

Systems that allow communication between the receptors and the effectors of the body so that correct reactions to any change in the environment can be brought about.

Question 3

What is the nervous co-ordinating system?

Answer 3

Responds the fastest and is brought about by impulses travelling along nerves.

Question 4

What is the endocrine co-ordinating system?

Answer 4

Is slower and is brought about by chemicals called hormones which are carried in the blood.

Question 5

What is the nervous system?

Answer 5

The nervous system is the body’s control and communication centre. It provides a continuous flow of information between the environment, the brain and the different parts of the body. This enables the body to function in an orderly and effective way and ti perform all the everyday tasks such as eating, running, solving a problem , controlling emotions such as fear, etc.

Question 6

What are the 3 types of function of the nervous system?

Answer 6

1. Sensory function
2. Integrative function
3. Motor function

Question 7

What is a sensory function?

Answer 7

Sensory receptors detect the changes in the external environment and the environment within the organism.

Question 8

What is an integrative function?

Answer 8

The central nervous system receives this information and decides which effectors need to react to the stimulus.

Question 9

What is a motor function?

Answer 9

Effectors (muscles and glands) bring about appropriate responses.

Question 10

You are riding a bicycle and become aware that the traffic light has turned red (_______). Your central nervous system integrates this information (red light means ‘stop’- _____), and you use your muscles to apply your apply your brakes to stop the bicycle (________).

Answer 10

Sensory function
Integrative function
Motor function

Question 11

What are stimuli?

Answer 11

Stimuli are physical or chemical changes in the environment (both internal and external) that are capable of causing a response in an organism.

Question 12

Give an example of stimuli. (4)

Answer 12

• Light
• Temperature
• Sounds
• Atmospheric pressure

Question 13

Give examples that bodily conditions are constantly changing? (3)

Answer 13

• Blood pressure
• Blood pH
• Tensions in muscles