Fundamentals of Anatomy and Physiology (Package)
Fundamentals of Anatomy and Physiology (Package)
10th Edition
ISBN: 9780134566979
Author: Martini
Publisher: PEARSON
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Chapter 10, Problem 7RQ
Summary Introduction

Introduction:

Muscles are made up of myocytes or muscle cells. The muscle cells contain a long chain of myofibrils. The myofibrils are made up of actin, titin and myosin which are the proteins involved in muscle contraction and they extend the whole length of muscle cell.

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In the sliding filament theory of contraction, what prevents the filaments from sliding back to their original positions each time a myosin head releases to bind to next actin binding site?
How are myofilaments and sarcomeres of myofibrils related?
A skeletal muscle is packed with myofibrils consisting of a repeating chain of contractile units we call “sarcomere”. What happens when these contractile units slide past each other without shortening?

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Fundamentals of Anatomy and Physiology (Package)

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