Synapses and Reflexes

Question 1

What do neurones transmit?

Answer 1

Information very quickly to and from the brain

Question 2

What do synapses connect?

Answer 2

Neurones

Question 3

How are the nerve signals transferred?

Answer 3

By chemicals which diffuse across the gap

Question 4

What do the chemicals do?

Answer 4

Set off a new electrical signal in the next neurone

Question 5

What do reflexes do?

Answer 5

Prevent injury

Question 6

What are reflexes?

Answer 6

Automatic responses to certain stimuli

Question 7

What does the reflex arc go through?

Answer 7

The central nervous system

Question 8

What are the steps of the reflex arc?

Answer 8

Stimulus 
Receptor 
Sensory neurone
Relay neurone
Motor neurone 
Effector
Response

Question 9

What happens when a stimulus is detected by a receptor?

Answer 9

Impulses are sent

Question 10

What happens when the impulses reach a synapse?

Answer 10

They trigger chemicals to be released and cause impulses to be sent along the next neurone