2. Voltage gated Na+ channels have three state: open, closed and inactivated. Observe the following diagram of a neuron. The place marked with a "X" is where an action potential has just occurred. The circle marks where an action potential is about to occur. а. At each arrow in the diagram, A, B & C, indicate whether voltage gated Na+ channels are open, closed or inactivated. C B A
2. Voltage gated Na+ channels have three state: open, closed and inactivated. Observe the following diagram of a neuron. The place marked with a "X" is where an action potential has just occurred. The circle marks where an action potential is about to occur. а. At each arrow in the diagram, A, B & C, indicate whether voltage gated Na+ channels are open, closed or inactivated. C B A
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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Transcribed Image Text:2. Voltage gated Na+ channels have three state: open, closed and inactivated. Observe the
following diagram of a neuron. The place marked with a "X" is where an action potential has just
occurred. The circle marks where an action potential is about to occur.
a.
At each arrow in the diagram,
A, B & C, indicate whether voltage
gated Na+ channels are open, closed
or inactivated.
C
В
A
b. What would happen if you inserted an electrode in the middle of an axon that is at rest, and
thereby induced a change in the membrane potential at that location to make it -40mV?
Would an action potential result? Yes or No. If Yes, how would this be similar or different
from a normal action potential? Explain briefly.
What would happen if you inserted an electrode in the middle of an axon that is at rest, and
thereby induced a change in the membrane potential at that location to make it -60mV?
Would an action potential result? Yes or No. If Yes, how would this be similar or different
from a normal action potential? Explain briefly.
С.
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