Action Potentials 23) Name the only two structures in the body that can accommodate action potentials. 24) What is another name for action potential? 25) During the resting state of an AP, describe the positions of the Nat and K+ channels. 26) Describe how the two voltage-sensitive Na + gates work at rest. 27) Does the K+ channel have a voltage-sensitive Nat gate? What happens to this channel at rest? At depolarization? 28) At depolarization, what happens to the Nat channels? 29) What is threshold? 30) At repolarization, what happens to the Na+ channels and the K+ channels? 31) At hyperpolarization, what happens to the Na+ channels and the Kt channels? 32) What is the function of Na+/K+ pumps during an AP ? Generation of an Action Potential Across the Sarcolemma 33) Describe the steps of the end plate potential during an AP in a skeletal muscle fiber and include these key words: Ach, sarcolemma, chemically gated ion channels. 34) Describe the steps of depolarization during an AP in a skeletal muscle fiber and include these key words: threshold, voltage-gated Na t channels. 35) Describe the steps of repolarization during an AP in a skeletal muscle fiber and include. these key words: voltage-gated Nat and K+ channels, refractory period..

1. Action Potentials 23) Name the only two structures in the body that can accommodate action
potentials. 24) What is another name for action potential? 25) During the resting state of an AP,
describe the positions of the Nat and K+ channels. 26) Describe how the two voltage-sensitive Na
+ gates work at rest. 27) Does the K+ channel have a voltage-sensitive Nat gate? What happens
to this channel at rest? At depolarization? 28) At depolarization, what happens to the Nat
channels? 29) What is threshold? 30) At repolarization, what happens to the Na+ channels and
the K+ channels? 31) At hyperpolarization, what happens to the Na+ channels and the Kt
channels? 32) What is the function of Na+/K+ pumps during an AP ? Generation of an Action
Potential Across the Sarcolemma 33) Describe the steps of the end plate potential during an AP in
a skeletal muscle fiber and include these key words: Ach, sarcolemma, chemically gated ion
channels. 34) Describe the steps of depolarization during an AP in a skeletal muscle fiber and
include these key words: threshold, voltage-gated Na t channels. 35) Describe the steps of
repolarization during an AP in a skeletal muscle fiber and include. these key words: voltage-gated
Nat and K+ channels, refractory period.