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ervous System I: Resting Membrane Potential 1. In a cell permeable only to K*, the resting membrane potential would be called the potential for K", which is mV. 2. In an excitable cell, also permeable to Na" and CI, the electrochemical gradient for Na" causes it to move the cell. 3. Excitable cells, like neurons, are more permeable to than to a. What acts as a chemical force that pushes K' out of the cell? b. What force tends to pull K back into the cell?

ervous System I: Resting Membrane Potential 1. In a cell permeable only to K*, the resting membrane potential would be called the potential for K", which is mV. 2. In an excitable cell, also permeable to Na" and CI, the electrochemical gradient for Na" causes it to move the cell. 3. Excitable cells, like neurons, are more permeable to than to a. What acts as a chemical force that pushes K' out of the cell? b. What force tends to pull K back into the cell?

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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Nervous System I: Resting Membrane Potential 1. In a cell permeable only to K*, the resting membrane potential would be called the potential for K*, which is mV. 2. In an excitable cell, also permeable to Na" and CI, the electrochemical gradient for Na" causes it to move the cell. 3. Excitable cells, like neurons, are more permeable to than to a. What acts as a chemical force that pushes K" out of the cell? b. What force tends to pull K' back into the cell? 4. Because the neuron is permeable to Na" as well as K", the resting membrane potential is not equal to the equilibrium potential for K; instead, it is mV. 5. What compensates for the movement (leakage) of Na' and K" ions? 6. What will happen to the resting membrane potential of an excitable cell if: (Write pos or neg to indicate which way. the membrane potential would change.) a. t extracellular fluid concentration of K b. extracellular fluid concentration of K c. T extracellular fluid concentration of Na d. 4 number of passive Na" channels e. open voltage-gated K* channels f. open voltage-gated Na' channels
Transcribed Image Text:Nervous System I: Resting Membrane Potential 1. In a cell permeable only to K*, the resting membrane potential would be called the potential for K*, which is mV. 2. In an excitable cell, also permeable to Na" and CI, the electrochemical gradient for Na" causes it to move the cell. 3. Excitable cells, like neurons, are more permeable to than to a. What acts as a chemical force that pushes K" out of the cell? b. What force tends to pull K' back into the cell? 4. Because the neuron is permeable to Na" as well as K", the resting membrane potential is not equal to the equilibrium potential for K; instead, it is mV. 5. What compensates for the movement (leakage) of Na' and K" ions? 6. What will happen to the resting membrane potential of an excitable cell if: (Write pos or neg to indicate which way. the membrane potential would change.) a. t extracellular fluid concentration of K b. extracellular fluid concentration of K c. T extracellular fluid concentration of Na d. 4 number of passive Na" channels e. open voltage-gated K* channels f. open voltage-gated Na' channels
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