100 75 50 25 2 3 sarcomere length (um) Figure Q16-1 Tension as a function of sarcomere length during isometric contraction (Problem 16-5). tension (% of maximum)

Biology 2e
2nd Edition
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark
Chapter38: The Musculoskeletal System
Section: Chapter Questions
Problem 23RQ: The ability of a muscle to generate tension immediately after stimulation is dependent on: myosin...
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Detailed measurements of sarcomere length and
tension during isometric contraction in striated muscle
provided crucial early support for the sliding-filament
model of muscle contraction. Based on your understand-
ing of the sliding-filament model and the structure of a
sarcomere, propose a molecular explanation for the rela-
tionship of tension to sarcomere length in the portions of
Figure Q16–1 marked I, II, III, and IV. (In this muscle, the
length of the myosin filament is 1.6 μm, and the lengths of
the actin thin filaments that project from the Z discs are 1.0
μm.)

100
75
50
25
2
3
sarcomere length (um)
Figure Q16-1 Tension as a function of sarcomere length during
isometric contraction (Problem 16-5).
tension (% of maximum)
Transcribed Image Text:100 75 50 25 2 3 sarcomere length (um) Figure Q16-1 Tension as a function of sarcomere length during isometric contraction (Problem 16-5). tension (% of maximum)
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