Topic 2 - Responding To Change: Nervous System

Question 1

What are the three types of neurone and what do they do?

Answer 1

Sensory neurones carry signals from the receptors in the sense organs to the central nervous system. Relay neurones carry signals from sensory neurones to motor neurones. Motor neurones carry signals from the central nervous system to the effector muscles or glands.

Question 2

What are sense organs?

Answer 2

They are organs that contain receptors. The receptors are sensitive to different stimuli and change the stimulus energy into electrical impulses in the nervous system.

Question 3

You see a stampeding elephant. Describe the route an electrical impulse takes to make you run away.

Answer 3

Information from receptors in your eyes passed from the receptor to a sensory neurone. It then passes to a relay neurone, then to a motor neurone, and then to an effector.

Question 4

What is the central nervous system (CNS)?

Answer 4

The (CNS) is made up of the brain and spinal cord and is where all the information from sense organs is sent.