Quiz 4 Local Anesthetics 2nd.

Question 1

Drugs that reversibly block the conduction of electrical impulses along nerve fibers are called?

Answer 1

Local Anesthetics

Question 2

Removal of the ______ _________ is followed by spontaneous and complete return of nerve conduction, with no evidence of structural damage to nerve fibers.

Answer 2

local anesthetics

Question 3

The ability of the local anesthetic to work is dependent on what factors?

Answer 3

• physiochemical properties of the local anesthetic

- Anatomy of the verve being blocked

Question 4

What part of the nerve does a schwann cell sheath wrap around?

Answer 4

Axon

Question 5

What is a node of ravier?

Answer 5

Located on the axon between two schwann cell sheaths.

Question 6

What is the resting membrane potential of a peripheral nerve?

Answer 6

-70 mV

Question 7

When a resting nerve is activated the membrane potential is ________.

Answer 7

Reversed

Question 8

The influx of what electrolyte during the depolarization of a nerve?

Answer 8

Na+

Question 9

What is the mechanism of action that restores a nerve back to the resting membrane potential?

Answer 9

Na/K ATPase pump 3:2 ratio

Question 10

Once this process has reversed the membrane potential to ______mV, an outward __________ ___________ develops and begins to resist the inward diffusion of ____.

Answer 10

+35, electrochemical gradient, Na+

Question 11

What electrolyte is pumped back into the nerve cell to restore the nerve resting membrane potential

Answer 11

K

Question 12

What is hyperpolarization of a nerve cell?

Answer 12

When the membrane potential is < - 70 mV.

Question 13

What is the refractory period?

Answer 13

A time frame when there can be no depolarization of a cell.