2. Cells and Control: Nervous System

Question 1

What does the Central Nervous System do?

Answer 1

Coordinates a response
Made up of neurons
Body has lots of sensory receptors - detect a change in environment (stimulus)
When a stimulus is detected by a receptor - info is coverted to an electrical impulse and is sent along sensory neurons to the CNS then decides what to do - impulses travel across relay neurone
CNS sends info to an effector along a motor neurone - effector then responds accordingly (muscle may contract)

Question 2

How is the Nervous System made up?

Answer 2

Stimulus - Receptor - Sensory neurone - Synapse - Relay neurone - Synapse - Motor neurone - Effector - Response

Question 3

What are Sensory Receptors?

Answer 3

Group of cells that detect a stimulus

Question 4

How do impulses travel through the Nervous System?

Answer 4

Information is converted into electrical impulses and sent along sensory neurones

Question 5

How does CNS co-ordinate a response?

Answer 5

It decides what to do by sending the electrical impulses through the relay neurone

Question 6

What are Effectors?

Answer 6

A muscle or gland

Question 7

What is Reaction Time?

Answer 7

The time it takes for you to respond to a stimulus

Question 8

What are Neurones? What are the 3 types?

Answer 8

Sensory
Relay
Motor

Question 9

What is a Sensory Neurone?

Question 10

What is a Motor Neurone?

Question 11

What is a Relay Neurone?