10

Question 1

Central Nervous System componants

Answer 1

Brain and spinal cord

Question 2

CNS role

Answer 2

Processes sensory information
Decides what to do and initiates a response

Question 3

Peripheral Nervous System components and role

Answer 3

All other nerves
Carry info from receptors to CNS

Question 4

Conscious Nervous Coordination

Answer 4

When you are aware of what you do - action is thought about

Question 5

Unconscious Nervous Coordination

Answer 5

Uses spinal cord only - action is involuntary

Question 6

Unconscious Nervous Coordination

Answer 6

Uses spinal cord only - action is involuntary

Question 7

What neurones are used in a nerve response?

Answer 7

Motor
Intermediate
Sensory

Question 8

Dendrite

Answer 8

Carries impulses toward cell body

Question 9

Cell body

Answer 9

Contains neurone nucleus

Question 10

Axon

Answer 10

Carries impulses away from cell body

Question 11

Axon terminal

Answer 11

END
connects to dendrites of a new cell

Question 12

Structure of myelin sheath

Answer 12

High fat content
Flat schwann cells
made from schwann cells

Question 13

Why is speed of conduction faster in non myelinated neurones?

Answer 13

• lack of insulation
  amplification causing less shielding

Question 14

What is a synaptic cleft?

Answer 14

Gap between two neurones

Question 15

Importance of mitochondria to neurones

Answer 15

Mitochondria produces ATP

Neurone dendrites and axons use ATP for the Na+/K+ pump to maintain/restore resting potential

Synapses use ATP for calcium induced exocytosis of Golgi vesicles containing neurotransmitter into synaptic clefts.

Question 16

How does L-dopa affect synaptic transmission in a person with parkinsons?

Answer 16

L-dopa is precursor of dopamine
Increases amount of dopa in presynaptic neurone
normal levels of dopa stimulate the post synaptic neurone

Question 17

How may serotonin imbalances affect a persons mood?

Answer 17

Lower levels of serotonin in brain may cause fewer receptors in brain to be stimulated meaning fewer brain impulses may lead to anxiety and or depression

Question 18

Drug which mimics a neurotransmitter known as an

Answer 18

agonist

Question 19

Drug which blocks neurotransmitter known as an

Answer 19

antagonist

Question 20

Example of agonistic drug which impact on cholinergic synapses is

Answer 20

nicotine

Question 21

Botulin prevents transmission

Answer 21

Ach not released from synaptic knob

So cannot diffuse across synaptic cleft

So cannot bind to receptors on post-synaptic membrane

So sodium gates cannot open

No depolarisation; no impulse