Human Anatomy (8th Edition)
Human Anatomy (8th Edition)
8th Edition
ISBN: 9780134243818
Author: Elaine N. Marieb, Patricia Brady Wilhelm, Jon B. Mallatt
Publisher: PEARSON
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Chapter 10, Problem 12RQ
Summary Introduction

To review:

The sliding filament theory of contraction.

Introduction:

Muscle fibers contain myofilaments (actin and myosin) that are arranged in the form of specialized contractile organelles called myofibrils. Each myofibril is surrounded by sarcoplasmic reticulum, mitochondria, and glycosomes. The myofibril contains repeating units of sarcomere. I (isotropic) and A (anisotropic) bands of sarcomere give the muscle tissue its striated appearance.

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