Use what you know about the physiology of neurons to answer the following questions. Treat questions a - c as unrelated to each other. a. Imagine that a toxin creates pores in a neuron that are permeable to Na*. Describe its immediate effect on the resting potential: identify which ions diffuse across the membrane, which direction they diffuse (and why), and whether this brings the neuron closer to or further from its threshold potential. b. Imagine that a toxin makes K* leak channels more permeable to K* ions. Describe its immediate effect on the resting potential: identify which ions diffuse across the membrane, which direction they diffuse (and why), and whether this depolarizes or hyperpolarizes the neuron.

Use what you know about the physiology of neurons to answer the following questions. Treat questions a - c as unrelated to each other. a. Imagine that a toxin creates pores in a neuron that are permeable to Na. Describe its immediate effect on the resting potential: identify which ions diffuse across the membrane, which direction they diffuse (and why), and whether this brings the neuron closer to or further from its threshold potential. b. Imagine that a toxin makes K leak channels more permeable to K* ions. Describe its immediate effect on the resting potential: identify which ions diffuse across the membrane, which direction they diffuse (and why), and whether this depolarizes or hyperpolarizes the neuron.

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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There is a type of toxin found in the liver of the puffer fish that prevents the opening of voltage-gated Na+ channels in neurons. The effect of this toxin is to: Group of answer choices A. prevents the initiation of the action potential B. depolarizes the membrane potential and maintains it depolarized C. prolongs the return of the membrane potential to the resting level D. increases the duration of the action potential
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