QUESTION 4 Identify the structure of the musc
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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O terminal cisterna
QUESTION 4
Identify the structure of the muscle fiber as indicated by the arrow in the image.
O actin filament
OZ disc
O myosin filament
Omyofibril
QUESTION 5
Identify the structure of the muscle fiber as indicated by the arrow in the image.
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Transcribed Image Text:Question Completion Status
O myosin filament
O myofibril
QUESTION 5
Identify the structure of the muscle fiber as indicated by the arrow in the image.
O myofibril
O muscle fiber
O fascicle
O myofilament
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Expert Solution
Step 1
Each of the muscle fibers are made up of even smaller fibers called as myofibrils. These myofibrils are formed of actin and myosin filaments. The actin filaments are thinner and myosin are thicker. The actin filaments are anchored to the Z lines. The sarcomere is the region between two Z lines. Myosin filaments overlap the actin filaments within a sarcomere.
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