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8. Assuming two skeletal muscle fibers have the same myosin ATPase activity, and both are producing an equal force, but one fiber is longer than the other one. Which of the following best describes their shortening velocities? I A. Long fiber has a higher velocity during isotonic contraction than the short one B. Long fiber has a higher velocity during isometric contraction than the short one C. Long fiber has a lower velocity during isotonic contraction than the short one D. Long fiber has a lower velocity during isometric contraction than the short one E. Both fibers have the same velocity during isotonic contraction F. Both fibers have the same velocity during isometric contraction

8. Assuming two skeletal muscle fibers have the same myosin ATPase activity, and both are producing an equal force, but one fiber is longer than the other one. Which of the following best describes their shortening velocities? I A. Long fiber has a higher velocity during isotonic contraction than the short one B. Long fiber has a higher velocity during isometric contraction than the short one C. Long fiber has a lower velocity during isotonic contraction than the short one D. Long fiber has a lower velocity during isometric contraction than the short one E. Both fibers have the same velocity during isotonic contraction F. Both fibers have the same velocity during isometric contraction

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
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8. Assuming two skeletal muscle fibers have the same myosin ATPase activity, and both are producing an equal force, but one fiber is longer than the other one. Which of the following best describes their shortening velocities? I A. Long fiber has a higher velocity during isotonic contraction than the short one B. Long fiber has a higher velocity during isometric contraction than the short one C. Long fiber has a lower velocity during isotonic contraction than the short one D. Long fiber has a lower velocity during isometric contraction than the short one E. Both fibers have the same velocity during isotonic contraction F. Both fibers have the same velocity during isometric contraction
Transcribed Image Text:8. Assuming two skeletal muscle fibers have the same myosin ATPase activity, and both are producing an equal force, but one fiber is longer than the other one. Which of the following best describes their shortening velocities? I A. Long fiber has a higher velocity during isotonic contraction than the short one B. Long fiber has a higher velocity during isometric contraction than the short one C. Long fiber has a lower velocity during isotonic contraction than the short one D. Long fiber has a lower velocity during isometric contraction than the short one E. Both fibers have the same velocity during isotonic contraction F. Both fibers have the same velocity during isometric contraction
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  • Isotonic contraction :- During isotonic contraction of muscle, same tension maintained while the length of the muscle changes. It can be of two types  concentric (muscle shortens) and eccentric (muscle lengthens).
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