Age tends to increase the number of type fibers and decrease the number of type fibers. а. 1, 2 O b. 2, 1 C. Age has no effect.
Age tends to increase the number of type fibers and decrease the number of type fibers. а. 1, 2 O b. 2, 1 C. Age has no effect.
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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Transcribed Image Text:Age tends to increase the number of type.
fibers and decrease the number of type.
fibers.
а. 1, 2
b. 2, 1
C. Age has no effect.
O O O O
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There are two types of skeletal muscle fibers. They are type I and type II muscle fibers. Type I muscle fibers are slow-twitch muscle fibers, whereas type II muscle fibers are fast-twitch fibers. Type I muscle fibers are effective for extended periods and are used in maintaining posture and doing endurance exercise. Type II fibers are useful for instant speed and use anaerobic metabolism for energy and they sustain for a longer time.
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