The intrafusal fibers OA. are of two types, fast twitch and slow twitch. OB. increase in number with strength training. OC. have contractile centers and noncontractile poles. O D. are found only in the antigravity muscles. F are of two types, nuclear bag and nuclear chain.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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The intrafusal fibers
O A. are of two types, fast twitch and slow twitch.
B. increase in number with strength training.
OC. have contractile centers and noncontractile poles.
D. are found only in the antigravity muscles.
O E. are of two types, nuclear bag and nuclear chain.
Transcribed Image Text:The intrafusal fibers O A. are of two types, fast twitch and slow twitch. B. increase in number with strength training. OC. have contractile centers and noncontractile poles. D. are found only in the antigravity muscles. O E. are of two types, nuclear bag and nuclear chain.
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