CONNECT ACCESS F/EXCERCISE PHYS
CONNECT ACCESS F/EXCERCISE PHYS
10th Edition
ISBN: 9781264594719
Author: Powers
Publisher: INTER MCG
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Chapter 8, Problem 1O
Summary Introduction

To draw: The microstructure of a skeletal muscle fiber.

Introduction: There are three types of muscle tissue cells in the body. they are cardiac muscle cells, skeletal muscle cells and smooth cells.

Expert Solution & Answer
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Answer to Problem 1O

Pictorial representation: Fig.1 represents the microstructure of a skeletal muscle fiber.

CONNECT ACCESS F/EXCERCISE PHYS, Chapter 8, Problem 1O

Fig.1: Microstructure of a skeletal muscle fiber

Explanation of Solution

A skeletal muscle fiber is a thin, elongated cylinder and is surrounded by a cell membrane called as sarcolemma. The satellite cells are the muscle precursor cells located above the sarcolemma and below the basal lamina. The myofibrils are the threadlike strands within the muscle fibers. Actin is a thin filament and myosin is the thick filament of myofibrils. The sarcomere includes the Z-line, H-line, M-line, I-band, and A-band. Sarcoplasmic reticulum serves as a storage site for calcium.

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