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Conducted at 100 m/s, an action potential in the above neuron would travel 1 m in 10 ms. In the case of a very narrow myelinated fiber with a diameter of 2 µm, the conduction velocity would be about 10 m/s. What difference, in ms, would this roughly 10-fold reduction in diameter make to the time required for a motor response involving motor fibers (e.g., to a muscle in the foot) that are 1 m long?

Conducted at 100 m/s, an action potential in the above neuron would travel 1 m in 10 ms. In the case of a very narrow myelinated fiber with a diameter of 2 µm, the conduction velocity would be about 10 m/s. What difference, in ms, would this roughly 10-fold reduction in diameter make to the time required for a motor response involving motor fibers (e.g., to a muscle in the foot) that are 1 m long?

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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Conducted at 100 m/s, an action potential in the above neuron would travel 1 m in 10 ms. In the case of a very narrow myelinated fiber with a diameter of 2 um, the conduction velocity would be about 10 m/s. What difference, in ms, would this roughly 10-fold reduction in diameter make to the time required for a motor response involving motor fibers (e.g., to a muscle in the foot) that are 1 m long?
Transcribed Image Text:Conducted at 100 m/s, an action potential in the above neuron would travel 1 m in 10 ms. In the case of a very narrow myelinated fiber with a diameter of 2 um, the conduction velocity would be about 10 m/s. What difference, in ms, would this roughly 10-fold reduction in diameter make to the time required for a motor response involving motor fibers (e.g., to a muscle in the foot) that are 1 m long?
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