Question 4 5/ 6 points Marybeth uses a library of venomous toxins to test their influence on neuronal firing. Below is a a summary of the effects. Predict what type of change would occur to neuronal activity. You can put I for increase or D for decrease. Toxin 1 2 3 4 5 6 Drug Effect Blocks Voltage-gated Na+ channels Decreases the sensitivity of the voltage sensing component of a Na+ channel so it requires more of a positive potential. Increases the period of hyperpolarization Causes the Na+/K+ pump to be more effective at moving K+ into the cell resulting in reduced K+ extracellular levels. Causes the concentration gradient of Cl- to flip so that when Cl- channel open you get? Blocks passive leak channels for K+. Reducing the relative perameability of K+ at rest. Neuronal activity (increased or decreased)

Question 4 5/ 6 points Marybeth uses a library of venomous toxins to test their influence on neuronal firing. Below is a a summary of the effects. Predict what type of change would occur to neuronal activity. You can put I for increase or D for decrease. Toxin 1 2 3 4 5 6 Drug Effect Blocks Voltage-gated Na+ channels Decreases the sensitivity of the voltage sensing component of a Na+ channel so it requires more of a positive potential. Increases the period of hyperpolarization Causes the Na+/K+ pump to be more effective at moving K+ into the cell resulting in reduced K+ extracellular levels. Causes the concentration gradient of Cl- to flip so that when Cl- channel open you get? Blocks passive leak channels for K+. Reducing the relative perameability of K+ at rest. Neuronal activity (increased or decreased)

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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