Answered: An action potential is shown below. At…

An action potential is shown below. At 1 what point in the graph are there lots of sodium ion channels open and potassium ion channels closed?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter29: Neural Control

Section: Chapter Questions

Problem 3SA: Action potentials occur when ______. a. potassium gates close b. a stimulus pushes membrane...

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Learning is defined as a relatively permanent and irreversible adaptive change in behavior. It always results from experience. The ability of an organism to store and recall the effects, sensations, and knowledge gained through learning and experience is called memory.

Question

1. Which option is correct?

An action potential is shown below. At 1 point
what point in the graph are there lots
of sodium ion channels open and
potassium ion channels closed?
3
A
2
-55
-70-
5
1
2
3
Time (msec)
Membrane potential (mv)
02
3
O 4
O 5

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Which ion channel is open at phase K? +30 M N K -55 L -70 Time Voltage-gated ion channel specific to sodium ions Voltage-gated ion channel specific to potassium ions Ligand-gated ion channel specific to sodium ions Ligand-gated ion channel specific to potassium ions Membrane potential (mV)
Draw the current changes caused by a single voltage gated Potassium channel when the membrane is voltage-clamped at different voltage values (see below). Assume an equilibrium potential for potassium of -70mV and don't worry about exact values for the currents (approximations are fine). Label the axes on the traces and describe how the dynamics of individual voltage gated potassium channels come together to form the macroscopic K+ currents during depolarization. . a. @Resting Membrane Potential = -70 mV b. @Voltage Step = -20 mV c. @Voltage Step = +50mV
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