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which are Communication between neurons is mediated by rapid changes in propagated along the length of axonal membranes. These rapid changes are referred to as action potentials; membrane potentials stimuli; action potentials energy; RMPs membrane potential; action potentials

which are Communication between neurons is mediated by rapid changes in propagated along the length of axonal membranes. These rapid changes are referred to as action potentials; membrane potentials stimuli; action potentials energy; RMPs membrane potential; action potentials

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Question:** Communication between neurons is mediated by rapid changes in _________ which are propagated along the length of axonal membranes. These rapid changes are referred to as __________. **Options:** - ⦿ action potentials; membrane potentials - stimuli; action potentials - energy; RMPs - membrane potential; action potentials **Selected Option:** - ⦿ action potentials; membrane potentials
Transcribed Image Text:**Question:** Communication between neurons is mediated by rapid changes in _________ which are propagated along the length of axonal membranes. These rapid changes are referred to as __________. **Options:** - ⦿ action potentials; membrane potentials - stimuli; action potentials - energy; RMPs - membrane potential; action potentials **Selected Option:** - ⦿ action potentials; membrane potentials
**Educational Content: Understanding Action Potentials** **Graph Explanation:** The plot displayed above illustrates the phases of an action potential, with voltage on the y-axis and time on the x-axis: - **A**: Represents the resting state around -70mV. - **B**: Shows depolarization, where the membrane potential rapidly rises to above +50mV. - **C**: Indicates repolarization, where the potential falls back towards resting levels. - **D**: Displays hyperpolarization slightly below resting potential. - **E**: Marks the threshold potential that must be exceeded for an action potential to occur, shown around -50mV. **Diagrams:** Images **K, L,** and **M** depict different configurations of ion channels and the Na+/K+ ATPase pump: - **Image K**: Shows the configuration during resting state, with the Na+/K+ pump actively exchanging Na+ out for K+ into the cell, maintaining the negative resting potential. - **Image L**: Depicts open voltage-gated Na+ channels, representing depolarization, as Na+ ions flood into the cell. - **Image M**: Illustrates open voltage-gated K+ channels, indicating repolarization and hyperpolarization as K+ ions exit the cell, restoring negative charge. **Matching Phases:** Match each action potential phase (A, B, C) to the correct image (K, L, M): - **A** [Choose] - **B** [Choose] - **C** [Choose] This exercise enhances understanding of the physiological processes underpinning neuronal action potentials.
Transcribed Image Text:**Educational Content: Understanding Action Potentials** **Graph Explanation:** The plot displayed above illustrates the phases of an action potential, with voltage on the y-axis and time on the x-axis: - **A**: Represents the resting state around -70mV. - **B**: Shows depolarization, where the membrane potential rapidly rises to above +50mV. - **C**: Indicates repolarization, where the potential falls back towards resting levels. - **D**: Displays hyperpolarization slightly below resting potential. - **E**: Marks the threshold potential that must be exceeded for an action potential to occur, shown around -50mV. **Diagrams:** Images **K, L,** and **M** depict different configurations of ion channels and the Na+/K+ ATPase pump: - **Image K**: Shows the configuration during resting state, with the Na+/K+ pump actively exchanging Na+ out for K+ into the cell, maintaining the negative resting potential. - **Image L**: Depicts open voltage-gated Na+ channels, representing depolarization, as Na+ ions flood into the cell. - **Image M**: Illustrates open voltage-gated K+ channels, indicating repolarization and hyperpolarization as K+ ions exit the cell, restoring negative charge. **Matching Phases:** Match each action potential phase (A, B, C) to the correct image (K, L, M): - **A** [Choose] - **B** [Choose] - **C** [Choose] This exercise enhances understanding of the physiological processes underpinning neuronal action potentials.
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