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Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Question
Chapter 24, Problem 9SA
Summary Introduction
To review:
The structure of the myofibrils in the skeletal muscle, and the changes that occur in them to make contraction possible.
Introduction:
Myofibrils are the organelles that make up a muscle fiber.
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Chapter 24 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- What is the function of the sarcoplasmic reticulum in muscle cell contraction?arrow_forwardHow do actin and myosin interact in a sarcomere to bring about muscle contraction? What roles do ATP and calcium play?arrow_forwardIn the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.arrow_forward
- What is a motor unit? Why does a rapid series of muscle twitches yield a stronger overall contraction than a single twitch?arrow_forwardFigure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.arrow_forward
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