Synapses and Reflexes

Question 1

The connection between two neurones is called a…

Answer 1

Synapse

Question 2

How is the nerve signal transferred?

Answer 2

The nerve signal is transferred by chemicals which diffuse (move) across the gap.

Question 3

What do these chemicals do next?

Answer 3

These chemicals then set off a new electrical signal in the next neurone.

Question 4

Reflexes help prevent injury, explain…

Answer 4

Reflexes are automatic responses to certain stimuli - they can reduce the chances of being injured. For example, if someone shines a bright light in your eyes, your pupils automatically get smaller so that less light gets into the eye - this stops it getting damaged. Or when shocked body releases the hormone adrenaline automatically.

Question 5

The passage of information in a reflex (from receptor to effector) is called…

Answer 5

Reflex arc

Question 6

Name the 7 stages in the reflex arc block diagram from stimulus to response.

Answer 6

Stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector, response

Question 7

What do synapses do?

Answer 7

Synapses connect neurones