Synapses and Reflexes

Question 1

What do Neurones do?

Answer 1

Transmit information very quickly to and from the brain, and your brain quickly decides how to respond to a stimulus.

Question 2

What is a synapse?

Answer 2

The connection between two neurones

Question 3

How do synapses work?

Answer 3

The nerve signal is transferred (from the neurone) by chemicals which diffuse across the gap (between neurones)
These chemicals then set off a new electrical signal in the next neurone.

Question 4

Reflexes help prevent [ ]

Answer 4

Injury

Question 5

What are reflexes?

Answer 5

automatic responses to certain stimuli- they can reduce the chances of being injured.

Question 6

Which is faster Neurones or reflexes?

Answer 6

Reflexes

Question 7

What is a example of a reflex using light and an eye?

Answer 7

If someone shines a bright light in you eyes, your pupils automatically get smaller so that less light gets into the eye - this stops it getting damaged.

Question 8

If you get a shock, your body releases the [ ] automatically - it doesn’t wait for you to decide that you’re shocked

Answer 8

Hormone adrenaline

Question 9

What is a reflex arc?

Answer 9

The passages of information in a reflex (from receptor to effector)