Nervous System

Question 1

Action potential

Answer 1

Impulse transmission

Question 2

Action potential

Answer 2

Impulse transmission

Question 3

Sensory (afferent) neurones

Answer 3

Towards the CNS from sensory receptors

Question 4

Motor (efferent) neurones

Answer 4

From the CNS to effector organs

Question 5

Dendrite

Answer 5

Receive stimulus and carries it impulses toward the cell body

Question 6

Cell body (soma)

Answer 6

Contains nucleus

Question 7

Axon

Answer 7

Fibre which carries impulses away from cell body

Question 8

Schwann Cells

Answer 8

Cells which produce myelin in the peripheral nervous system

Question 9

Oligodendrocytes

Answer 9

Cells which produce myelin in the central nervous system

Question 10

Synapse

Answer 10

Gap between neurones

Question 11

Neurotransmitters

Answer 11

Serotonin, endorphins, dopamine, adrenaline/epinephrine, noradrenaline/norepinephrine

Question 12

The brain

Answer 12

1.5kg
Contains cranium and cerebrum, diencephalon, cerebellum and brain stem

Question 13

Cerebrum

Answer 13

Contains left and right cerebral hemispheres separated by longitudinal fissure. The hemispheres are connected via corpus callosum

Question 14

Diencephalon

Answer 14

Links nervous and endocrine system
Contains hypothalamus and thalamus

Question 15

Spinal cord

Answer 15

Relays messages between brain and body
Nerves leave the spinal cord in pairs
Contains 5 regions
33 vertebrae (bones)

Question 16

5 regions of the spinal cord

Answer 16

Cervical 7
Thoracic 12
Lumbar 5
Sacrum 5
Coccyx 4

Question 17

Meninges

Answer 17

3 layers of vertebrae called pia mater, arachnoid mater and dura mater

Question 18

2 spaces found between the meninges

Answer 18

Subarachnoid space
Epidural space

Question 19

Cerebrospinal fluid (CSF)

Answer 19

•A clear fluid that circulates around the brain and spinal cord which acts as a shock absorber
•Carries oxygen and nutrients and removes waste such as carbon dioxide