Biology: Life on Earth with Physiology (11th Edition)
Biology: Life on Earth with Physiology (11th Edition)
11th Edition
ISBN: 9780133923001
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 39.5, Problem 1ET

John comes to the emergency room with neither voluntary movement nor feeling in his legs. The ER physician pricks his leg with a pin and finds that his leg still withdraws from the pain. How can John have a normal pain-withdrawal reflex but feel no pain?

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