Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 32, Problem 3SQ

An action potential begins when ___ .

  1. a. a neuron reaches threshold potential
  2. b. voltage-gated potassium gates open
  3. c. voltage-gated .sodium gates dose
  4. d. sodium-potassium pumps stop operating
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When a neuron is at rest,_____ . a. it is at threshold potential b. voltage-gated sodium channels are open c. sodium–potassium pumps are operating d. it contains more sodium ions than the surrounding interstitial fluid
Neurotransmitters are released from neurons due to the opening of ____________. Select one: a. voltage gated Na channels b. voltage gated  K channels c. voltage gated Ca channles d. voltage gated Cl channels e. voltage gated proton channels
Action potentials ____. Select one: A.can occur only once B.can move up or down an axon, away from or towards the cell body C.move in a one way direction towards the cell body D.move in a one way direction away from the cell body
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