One of the primary characteristics of all muscle tissue is contractility, the ability to shorten (contract) and lengthen (relax). You've identified the various components of a myofibril above. Now, use the table below to indicate what occurs to each band, line, or zone when the muscle contracts vs. relaxes. What occurs to this region / structure during contraction/relaxation? No change Shortens Lengthens

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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One of the primary characteristics of all muscle tissue is contractility, the ability to shorten
(contract) and lengthen (relax). You've identified the various components of a myofibril above.
Now, use the table below to indicate what occurs to each band, line, or zone when the muscle
contracts vs. relaxes.
What occurs to this region / structure during contraction/relaxation?
Region / Structure
A-Band
H-Band
I-Band
M-Line
Z-Line
Zone of Overlap
Sarcomere
No change
Shortens
Lengthens
Muscle Contraction
Muscle Relaxation
Transcribed Image Text:One of the primary characteristics of all muscle tissue is contractility, the ability to shorten (contract) and lengthen (relax). You've identified the various components of a myofibril above. Now, use the table below to indicate what occurs to each band, line, or zone when the muscle contracts vs. relaxes. What occurs to this region / structure during contraction/relaxation? Region / Structure A-Band H-Band I-Band M-Line Z-Line Zone of Overlap Sarcomere No change Shortens Lengthens Muscle Contraction Muscle Relaxation
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