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Multiple answers may apply. +30 +10 0 -10- -30- -50 Threshold -70 -90 0 1 3 Time (msec)- It is safe to say that in this stage (#5) of an action potential, O K+; closing ONa+; closing K+; opening ONa+; opening Membrane potential (mv) channels are

Multiple answers may apply. +30 +10 0 -10- -30- -50 Threshold -70 -90 0 1 3 Time (msec)- It is safe to say that in this stage (#5) of an action potential, O K+; closing ONa+; closing K+; opening ONa+; opening Membrane potential (mv) channels are

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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**Action Potential Quiz** Multiple answers may apply. **Graph Explanation** The provided graph shows the changes in membrane potential over time during an action potential. The y-axis represents the membrane potential in millivolts (mV), ranging from -90 mV to +30 mV. The x-axis represents time in milliseconds (msec), spanning from 0 to 4 msec. Key features of the graph include: 1. The initial resting potential at approximately -70 mV. 2. A sharp increase in membrane potential, peaking at around +30 mV, marked with a green circle labeled as stage (#5). 3. A rapid decline in membrane potential, falling below the resting potential (hyperpolarization) before eventually stabilizing back to the resting level. 4. A dashed horizontal line labeled "Threshold," indicating the membrane potential that must be reached for the action potential to be initiated. **Question:** It is safe to say that in this stage (#5) of an action potential, ________ channels are ________. **Answer Choices:** 1. ☐ K⁺; closing 2. ☐ Na⁺; closing 3. ☐ K⁺; opening 4. ☐ Na⁺; opening
Transcribed Image Text:**Action Potential Quiz** Multiple answers may apply. **Graph Explanation** The provided graph shows the changes in membrane potential over time during an action potential. The y-axis represents the membrane potential in millivolts (mV), ranging from -90 mV to +30 mV. The x-axis represents time in milliseconds (msec), spanning from 0 to 4 msec. Key features of the graph include: 1. The initial resting potential at approximately -70 mV. 2. A sharp increase in membrane potential, peaking at around +30 mV, marked with a green circle labeled as stage (#5). 3. A rapid decline in membrane potential, falling below the resting potential (hyperpolarization) before eventually stabilizing back to the resting level. 4. A dashed horizontal line labeled "Threshold," indicating the membrane potential that must be reached for the action potential to be initiated. **Question:** It is safe to say that in this stage (#5) of an action potential, ________ channels are ________. **Answer Choices:** 1. ☐ K⁺; closing 2. ☐ Na⁺; closing 3. ☐ K⁺; opening 4. ☐ Na⁺; opening
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