Explain how the transmission of an action potential would be impacted if voltage- gated calcium channels could not open. In your answer, explain the usual process of how an action potential is transmitted from one neuron to the next neuron. Answer in a sentence format.

Explain how the transmission of an action potential would be impacted if voltage- gated calcium channels could not open. In your answer, explain the usual process of how an action potential is transmitted from one neuron to the next neuron. Answer in a sentence format.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section4.3: Action Potentials

Problem 2CYU

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Explain how the transmission of an action potential would be impacted if voltage-
gated calcium channels could not open. In your answer, explain the usual process of
how an action potential is transmitted from one neuron to the next neuron.
Answer in a sentence format.

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1. Which of the following is the rapid upstroke in the action potential? A. Phase 0 B. Phase 1 C. Phase 2 D. Phase 3
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Diagram an Action potential: an action potential graph showing the 4 steps of an action potential AND what is happening to the sodium voltage-gated channels and voltage-gated potassium channels at each step
Draw a typical action potential (correctly label axis) and explain in words the roles of ion channels in generating the different phases of the action potential. (Extra credit: How would opening voltage gated calcium channels upon depolarization affect the shape of the action potential if they have a relatively slow inactivation rate?)
At which point in the graph do voltage-gated potassium channels open? (Base your answer to this question on the graph below depicting an action potential.) A B C D E
State whether the channels listed would be open or closed at the corresponding numbered phases of the action potential graph. Phase on Graph Sodium Voltage Gated channels Potassium Voltage Gated channels 1 2 3 4
Describe the changes in the neuron membrane that occur throughout the course of an action potential. 2: Mention: Resting-state, threshold, depolarization, repolarization, and hyperpolarization. 3: mention how the action potential is related to neuron communication. (300 words)
1) When threshold (-55 mV) is reached: a) voltage-gated K+ channels immediately open. b) Na+ enters through voltage-gated channels. c) the inactivation gate on Na+ channels opens. d) K+ leak channels close. 2) At the peak of an action potential (choose the two correct answers): a) voltage-gated K+ channels are open. b) K+ leak channels close. c) voltage-gated Na+ channels inactivate. d) voltage-gated Na+ channels close.
List the membrane potential value that would coincide with the following events: a. Resting membrane potential b. Graded potentials c. Threshold for action potentials d. Opening of Potassium Channels/Closing of sodium channels during action potential.
List the series of events at the membrane that generate an action potential, including the contributions of chemically gated and voltage-gated ion channels?
The membrane potential labeled (0) is due to which of the following (when compared to (3) potential. (A) voltage-gated Na+ channels (B) voltage-gated K+ channels (C) voltage-gated slow Ca++ channels (D) voltage-gated fast Ca++ channels (E) voltage-gated transient Ca++ channels (F) funny channels