13 Nervous System 1 Quizzes

Question 1

Explain what is meant by the peripheral nervous system (PNS)

Answer 1

Any nervous tissue outside of the brain or spinal cord

Question 2

Name FOUR parts of a neuron

Answer 2

Cell body
Dendrites
Axon
Myelin sheath
Nodes of ranvier
Terminal endings

Question 3

Describe the function of microglia

Answer 3

Phagocytic

Question 4

Describe the function of Schwann cells

Answer 4

Produce myelin in the PNS

Question 5

Describe the movement of ions that occurs during
depolarisation

Answer 5

Sodium (Na+) flood into axon via sodium ion channels

Question 6

What is the charge present in a resting membrane?

Answer 6

-70mV

Question 7

What is meant by the action potential threshold?

Answer 7

The level a stimulus needs to reach to produce depolarisation
It is -55mV

Question 8

Explain what is meant by a synapse

Answer 8

The gap between two neurons or a neuron and a muscle cell where a nerve impulse is carried via chemical neurotransmitters

Question 9

Is GABA an excitatory or inhibitory neurotransmitter?

Answer 9

Inhibitory

Question 10

Where is most serotonin found?

Answer 10

In the GIT

Question 11

List THREE causes of carpal tunnel syndrome.

Answer 11

Pregnancy
RA
Power tools (vibration)

Question 12

Name the nerve involved in carpal tunnel syndrome

Answer 12

Median nerve

Question 13

Describe what happens pathologically in multiple sclerosis (MS)

Answer 13

Autoimmune, inflammatory disease causing demylination in the CNS

Question 14

List THREE symptoms of MS.

Answer 14

Loss of balance
Loss of vision
Blurring of vision
Double-vision
Jerking of eyeball
Pain (burning) sensation
Tingling, weakness

Question 15

Name the nerve implicated in Bell’s palsy.

Answer 15

VII Facial nerve

Question 16

Define the condition motor neurone disease (MND).

Answer 16

Degeneration of motor neurons

Question 17

At what age are individuals typically affected by:
a) Multiple sclerosis?
b) Motor neurone disease?

Answer 17

a) 20-50
b) 50-70

Question 18

State THREE suspected causes / risk factors of Alzheimer’s.

Answer 18

Heavy metal toxicity
Chronic inflammation (gluten, dairy, sugar)
Bacteria (gingavalis)
High homocysteine levels, high cortisols, lots of free radicals
Atherosclerosis
CV disease
Genetics

Question 19

Name the part of the brain affected by Parkinson’s disease.

Answer 19

Substantia niagra

Question 20

List FOUR symptoms of Parkinson’s disease.

Answer 20

Bradykinesia
‘Pill rolling’ tremor
Flexed posture
Lack of arm swinging
Shuffling gait
Muscle rigidity
Mask-like face