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Question 1

Depolarization due to

Answer 1

Na+ influx

Question 2

Repolarization due to

Answer 2

K+ efflux

Question 3

Hyperpolarization due to

Answer 3

K+ efflux

Question 4

After AP, K+ channels stay open, membrane potential approaches

Answer 4

K+ equilibrium

Question 5

Plateau of action potential

Answer 5

Ca++ in, K+ out

Question 6

Resting membrane potential is achieved by

Answer 6

K+ efflux

Question 7

Resting membrane potential is maintained by

Answer 7

Na+/K+ ATPase pump

Question 8

Depolarization in Organ of Corti

Answer 8

K+ influx into hair cell

Question 9

Utricle hair cell depolarization

Answer 9

K+ influx

Question 10

Neuronal repolarization due to

Answer 10

K+ efflux

Question 11

After hyperpolarization, which ion increases

Answer 11

K+

Question 12

Action potential reduced due to

Answer 12

Hyponatremia

Question 13

Electrolyte loss in 40% burn affecting AP

Answer 13

Hyponatremia

Question 14

AP height and slope decreased in

Answer 14

Hyponatremia

Question 15

Drug blocking Na+ channels effect

Answer 15

Blocks action potential

Question 16

Nerve in Na+-free medium

Answer 16

No action potential

Question 17

Na+ inactivation gate closing phase

Answer 17

Absolute refractory period

Question 18

Local cell response to increasing AP stimulus

Answer 18

Increased amplitude

Question 19

True about action potential

Answer 19

Subsequent APs cannot summate

Question 20

Excitation of nerve trunk

Answer 20

Compound action potential

Question 21

Depolarization recorded after nerve trunk stimulation

Answer 21

Compound action potential

Question 22

AP in myelinated fibers occurs at

Answer 22

Nodes of Ranvier

Question 23

Resting membrane potential maintained by

Answer 23

Na+/K+ ATPase pump

Question 24

Resting membrane potential mainly due to

Answer 24

Outward diffusion of K+

Question 25

If RMP decreases (less negative), due to

Answer 25

Loss of intracellular K+