A student is eating at the lab bench (a clear violation of lab policies) and mistakenly sprinkles tetrodotoxin on his fries. Explain the origin of the toxin and its normal function in that animal. Given that this substance inhibits voltage-gated sodium channels, indicate whether each of the statements below are true or false. Explain your answers. Explain the time course of the response.It will be more difficult for the student’s neurons to generate action potentialsThe student’s neurons will fire more frequently because membrane potential will be brough closer to threshold.The effect on the membrane potential o the student’s neurons could be predicted by the Nernst equation, which factors in the effects of both ion concentration and ion permeability.

Tetrodotoxin is a sodium channel blocker that also prevents the firing of action potential in…

Answered: It will be more difficult for the…

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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A student is eating at the lab bench (a clear violation of lab policies) and mistakenly sprinkles tetrodotoxin on his fries. Explain the origin of the toxin and its normal function in that animal. Given that this substance inhibits voltage-gated sodium channels, indicate whether each of the statements below are true or false. Explain your answers. Explain the time course of the response.
1. It will be more difficult for the student’s neurons to generate action potentials
2. The student’s neurons will fire more frequently because membrane potential will be brough closer to threshold.
3. The effect on the membrane potential o the student’s neurons could be predicted by the Nernst equation, which factors in the effects of both ion concentration and ion permeability.

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