Examine the graph below, and answer the questions that follow. a. Indicate the specific events that are occurring at 1, 2, 3, and 4. b. At which area of the graph are sodium ions rapidly entering the neuron? c. At which area of the graph are potassium ions rapidly leaving the neuron? At which area of the graph is the sodium ion concentration higher outside than inside the neuron? d. Membrane potential, V (mv) +50- 0 -50- -70- -90- 0 1 1 2 3 Time (ms) 4 5 threshold Vrest

Examine the graph below, and answer the questions that follow. a. Indicate the specific events that are occurring at 1, 2, 3, and 4. b. At which area of the graph are sodium ions rapidly entering the neuron? c. At which area of the graph are potassium ions rapidly leaving the neuron? At which area of the graph is the sodium ion concentration higher outside than inside the neuron? d. Membrane potential, V (mv) +50- 0 -50- -70- -90- 0 1 1 2 3 Time (ms) 4 5 threshold Vrest

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter5: The Central Nervous System

Section: Chapter Questions

Problem 12RE

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Similar questions

The presence of an electrical gradient is responsible for both the resting membrane potential and the action potential in the neuron.a. In this case who is responsible for maintaining the electric gradient to produce a potential for the resting membrane?b. Explain what is meant by an electrical gradient in the context of a cell (neuron)!
After the depolarisation phase of an action potential, the resting potential is restored by ______. Question 15 options: A) the opening of voltage-gated potassium channels and the closing or inactivation of sodium channels. B) the opening of more voltage-gated sodium channels. C) a decrease in the membrane's permeability to potassium and chloride ions following closing of the chloride-potassium pump. D) a brief inhibition of the sodium-potassium pump.
In the recording below, a neuron was bathed in a saline solution containing a pharmacologicalagent that altered the membrane currents being recorded. a) What ionic current is being recorded in these data? b) What pharmacological agent was likely used in this study and what did it do? c) Is the recorded ionic current transient or sustained and why?d) What is the role of this ionic current in the production of a neuronal action potential?
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Answer the following questions in regards to chemically gated ion channels in neurons: a. What is the chemical signal received by these channels? b. Where on the neuron will you find these channels? c. Describe how these channels open and close in response to a chemical stimulus.
shortly answer a,b and c following questions are related to action potentials in axons: a. What is happening to Na + ions and K+ ions during depolarization? b.Why do the Na= and K+ ions behave that way during depolarization? c.What has to happen in order for axons to get back into resting conditions?
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