KA4 U3

Question 1

What do neurons have

Answer 1

A cell body and fibres called dendrites and axons

Question 2

Impulses conducting along neuron fibres flow in

Answer 2

One direction

Question 3

Fibres that conduct impulses towards the cell body are called

Answer 3

Dendrites

Question 4

The cell body contains the nucleus and most of the cytoplasm is the

Answer 4

Control centre for the cells metabolism

Question 5

Myelin sheathe surround what

Answer 5

Axons

Question 6

What does the myelin sheath do

Answer 6

Insulates axons and increases the speed of impulse conduction

Question 7

Myelination is a process which

Answer 7

Myelin develops round axon fibres

Question 8

Myelination happens from birth to

Answer 8

Adolescence

Question 9

That’s why babies are so slow to

Answer 9

Responding to stimuli

Question 10

Some diseases destroy the myelin sheath causing

Answer 10

Loss of co-ordination

Question 11

Glial cells

Answer 11

Asso to axons

Question 12

Glial cells are needed to

Answer 12

Produce myelin sheath and support neurons

Question 13

The narrow space between axon ending of one neurone and the dendrite of the next neurone is the pathway called a

Answer 13

Synaptic cleft