Neuro Physiology Revision

Question 1

What is at the end of an axon which transmits messages to the dendritic branches?

Answer 1

Boutons

Question 2

What are the three main types of neurons

Answer 2

• Multipolar neurons
• Pseudonipolar neurons
• Bipolar neurons

Question 3

What cells does the disease “Multiple Sclerosis” attack?

Answer 3

Schwann cells

Question 4

How long is an internode?

Answer 4

1 - 2 mm

Question 5

What are nodes of Ranvier?

Answer 5

• Gaps in the myelin sheath along the axon which are exposed to the extracellular space
• They are highly enriched in ion channels, allowing them to participate in the exchange of ions required to regenerate an action potential

Question 6

What ion entry causes the neurotransmitter to be exocytosed?

Answer 6

Ca2+

Question 7

What is the threshold potential?

Answer 7

• 55 mV

Question 8

What is the collection of nerves between the two hemispheres called?

Answer 8

Corpus collosum

Question 9

What area of the brain is associated with Parkinson’s?

Answer 9

Basal ganglia

Question 10

What is the typical resting potential of a neuron?

Answer 10

-70 mV

Question 11

What is the primary excitatory neurotransmitter of the CNS?

Answer 11

Glutamate

Question 12

What do Ruffini endings detect?

Answer 12

Skin stretch

Question 13

WHat do Meissner’s corpuscles detect?

Answer 13

Touch

Question 14

What do Pacinian corpuscles detect?

Answer 14

Vibration

Question 15

Merkel’s disks detect?

Answer 15

Pressure, texture

Question 16

What do hair follicle receptors detect?

Answer 16

Stroking / air movement

Question 17

What do muscle spindles detect?

Answer 17

Muscle length

Question 18

What do golgi tendon organs detect?

Answer 18

Muscle tension

Question 19

What do joint receptors detect?

Answer 19

Joint angle