Identify the structural components of a sarcomere.
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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Question
Identify the structural components of a sarcomere.
Expert Solution
Step 1
Sarcomere can be defined as the primary structural part of myofibril in a skeletal muscle. It comprises protein myosin and actin filaments that give it a striated appearance by forming dark and light bands.
Step 2
The sarcomere primarily contains actin and myosin protein. These proteins are active structures present in the sarcomere and help in muscle contraction. The actins are thin filaments, and myosin is thick filaments. The association of actin and myosin forms a crossbridge, and when they slide past each other, it causes muscle contraction.
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