Action Potential and Skeletal Muscle

Question 1

The resting potential for a typical neuron such as a motor neuron is best represented by which of the following potential?

74

-74

90

-90

Answer 1

-90

Question 2

Which of the following type of neurons would transmit an action potential the fastest?

Small diameter, non-myelinated

Small diameter, myelinated

Large diameter, myelinated

Large diameter, non-myelinated

Answer 2

Large diameter myelinated

Question 3

Saltatory conduction is characteristics of which part of a typical neuron:

Dendrite

Nerve cell body

Axon hillock

Axon

Answer 3

Axon

Question 4

A selectivity filter with carbonyl oxygens is associated with which of the following kinds of ion channels?

Gated sodium

Non-gated Sodium

Potassium

Chloride

Answer 4

Potassium

Question 5

Why do nodes of Ranvier increase the velocity of nerve transmission?

Answer 5

Less resisitance and the depolarization can jump

Question 6

Why do action potentials typically travel in the orthodromic direction?

Answer 6

To conserve charge

Recovery period

Question 7

A capacitor’s capacitance is directly proportional and inversely proportional to:

Answer 7

• Directly = area of the plates
• Inversely = distance separating the plates