CB2e The Nervous System

Question 1

The brain and spinal chord form the…

Answer 1

Central Nervous System (CNS) which controls your body

Question 2

Nerves make up the rest of the…

Answer 2

Nervous system

Question 3

The nervous system allows parts of your body to communicate using electrical signals called…

Answer 3

impulses

Question 4

Stimulus

Answer 4

A change in a factor inside or outside the body

Question 5

Eyes, ears and skin are examples of…

Answer 5

Sense organs

Question 6

Sense organs contain…

Answer 6

receptor cells

Question 7

Receptor cells detect…

Answer 7

stimuli

Question 8

A receptor cell is…

Answer 8

A cell that detects a stimulus and converts it into an electrical impulse that is sent to the brain

Question 9

After recieving an impulse, the brain then processes the information and sends impulses to other parts of the body to cause a…

Answer 9

response

Question 10

The travelling of impulses is called…

Answer 10

neurotransmission

Question 11

Neurotransmission occurs in…

Answer 11

neurones

Question 12

To carry impulses, neurones have…

Answer 12

a cell body

long extensions

Question 13

Function of a sensory neurone

Answer 13

To carry impulses from receptor cells towards the CNS

Question 14

Dendrite

Answer 14

A fine extension from a neurone which carries impulses from a cell body

Question 15

Dendron

Answer 15

A long extension of a sensory neurone that carries impulses from the dendrites towards the axon terminal

Question 16

Axon

Answer 16

The long extendion that carries impulses away from the dendron and dendrites and towards the axon terminal

Question 17

Myelin Sheath

Answer 17

Is a fatty layer surrounding the dendron and axon.

It electrically insulates a neurone from neighbouring neurones to stop the signal from losing energy

It makes the impulse ‘jump’ along the cell between the gaps in myelin and so speeds up neurotransmission