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D B. A 70 Time in msec diagram above shows the changes in membrane ntial measured from a single point in a typical

D B. A 70 Time in msec diagram above shows the changes in membrane ntial measured from a single point in a typical

Human Anatomy & Physiology (11th Edition)
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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+70 D A -70 Time in msec The diagram above shows the changes in membrane potential measured from a single point in a typical mammalian motor neuron that has been artificially stimulated to threshold. Membrane potential in mV B
Transcribed Image Text:+70 D A -70 Time in msec The diagram above shows the changes in membrane potential measured from a single point in a typical mammalian motor neuron that has been artificially stimulated to threshold. Membrane potential in mV B
A. Tetrodotoxin (TTX) is a neurotoxin derived from the rough-skinned newt we met earlier in the quarter (the one that poisons garter snakes that eat it). TTX selectively blocks voltage-gated Na+ channels. Which point on the graph above would change the most if the neuron were treated with TTX, and how would it change? B. In the TTX experiment described above, assume the muscle cell is in a separate dish and is not exposed to the TTX directly. In this case, a muscle cell that was the target of the motor neuron would_ o contract normally o contract for a longer time than normal o contract for a shorter time than normal o fail to contract
Transcribed Image Text:A. Tetrodotoxin (TTX) is a neurotoxin derived from the rough-skinned newt we met earlier in the quarter (the one that poisons garter snakes that eat it). TTX selectively blocks voltage-gated Na+ channels. Which point on the graph above would change the most if the neuron were treated with TTX, and how would it change? B. In the TTX experiment described above, assume the muscle cell is in a separate dish and is not exposed to the TTX directly. In this case, a muscle cell that was the target of the motor neuron would_ o contract normally o contract for a longer time than normal o contract for a shorter time than normal o fail to contract
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