Vander's Human Physiology
Vander's Human Physiology
15th Edition
ISBN: 9781259903885
Author: WIDMAIER, Eric P., Vander, Arthur J.
Publisher: Mcgraw-hill Education,
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Chapter 9, Problem 1PI

(1)

Summary Introduction

To draw: A cross-section diagram that shows in the H zone.

Introduction: Myofilaments within the myofibrils are organized in a continuous manner with cylindrical units called sarcomeres. Inside the skeletal muscle fibers, there are several repeating sarcomeres arranged within a section of a myofibril. Overlapping of thick and thin filaments constitutes each sarcomere.

(1)

Expert Solution
Check Mark

Explanation of Solution

Pictorial representation: Fig.1 represents the H zone though cross-section of muscle fiber.

Vander's Human Physiology, Chapter 9, Problem 1PI , additional homework tip  1

Fig.1: H zone

H zone is the central portion of the A band that is present only in the resting sarcomere. The H zone region does not have overlapping thin filament. It only has thick filament.

(2)

Summary Introduction

To draw: A cross-section diagram that shows in the I band.

(2)

Expert Solution
Check Mark

Explanation of Solution

Pictorial representation: Fig.1 represents the I band though cross-section of muscle fiber.

Vander's Human Physiology, Chapter 9, Problem 1PI , additional homework tip  2

Fig.1: I zone

I band is the only region that contains thin filament and extends from both directions of Z disk. At the region of maximal shortening, the thin filaments of the muscle fiber are pulled parallel along the thick filaments. This leads to decrease of I bands.

(3)

Summary Introduction

To draw: A cross-section diagram that shows at the M line.

(3)

Expert Solution
Check Mark

Explanation of Solution

Pictorial representation: Fig.1 represents the M line though cross-section of muscle fiber.

Vander's Human Physiology, Chapter 9, Problem 1PI , additional homework tip  3

Fig.1: M line

M line is the narrow, dark band in the center region of the H zone known as M line that corresponds to proteins link together at the central region of the adjacent thick filament.

(4)

Summary Introduction

To draw: A cross-section diagram that shows in the Z line.

(4)

Expert Solution
Check Mark

Explanation of Solution

Pictorial representation: Fig.1 represents the Z line though cross-section of muscle fiber.

Vander's Human Physiology, Chapter 9, Problem 1PI , additional homework tip  4

Fig.1: Z line

The sarcomeres are composed of thin and thick overlapping filaments. It is delineated by Z disks on both ends. These disks are composed of specialized proteins that are perpendicular to myofilaments and function as an anchor for the thin filament.

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Chapter 9 Solutions

Vander's Human Physiology

Ch. 9 - Prob. 11PICh. 9 - Prob. 12PICh. 9 - Prob. 13PICh. 9 - List the three types of muscle cells and their...Ch. 9 - Prob. A.2RQCh. 9 - Describe the organization of myosin, actin,...Ch. 9 - Prob. A.4RQCh. 9 - Describe the structure and function of the...Ch. 9 - Define motor unit and describe its structure. Ch. 9 - Describe the sequence of events by which an action...Ch. 9 - What is an end-plate potential, and what ions...Ch. 9 - Prob. A.9RQCh. 9 - What prevents cross-bridges from attaching to...Ch. 9 - Prob. A.11RQCh. 9 - Prob. A.12RQCh. 9 - Prob. A.13RQCh. 9 - Prob. A.14RQCh. 9 - Prob. A.15RQCh. 9 - Describe isometric, concentric, and eccentric...Ch. 9 - Prob. A.17RQCh. 9 - Prob. A.18RQCh. 9 - Prob. A.19RQCh. 9 - Prob. A.20RQCh. 9 - Prob. A.21RQCh. 9 - What fuel molecules are metabolized to produce ATP...Ch. 9 - Prob. A.23RQCh. 9 - What component of skeletal muscle fibers accounts...Ch. 9 - Summarize the characteristics of the three types...Ch. 9 - Prob. A.26RQCh. 9 - Prob. A.27RQCh. 9 - Prob. A.28RQCh. 9 - Prob. A.29RQCh. 9 - Prob. A.30RQCh. 9 - Prob. A.31RQCh. 9 - Prob. A.32RQCh. 9 - Prob. 14PICh. 9 - Prob. B.1RQCh. 9 - Prob. B.2RQCh. 9 - Prob. B.3RQCh. 9 - Prob. B.4RQCh. 9 - Prob. B.5RQCh. 9 - Prob. B.6RQCh. 9 - Prob. B.7RQCh. 9 - Prob. B.8RQCh. 9 - Prob. B.9RQCh. 9 - Explain why cardiac muscle cannot undergo tetanic...Ch. 9 - Prob. 1RRCh. 9 - Prob. 2RRCh. 9 - Prob. 1RCCh. 9 - Prob. 2RCCh. 9 - Prob. 3RCCh. 9 - Prob. 4RCCh. 9 - Prob. 5RCCh. 9 - Prob. 6RCCh. 9 - Prob. 7RCCh. 9 - Prob. 8RCCh. 9 - Prob. 9RCCh. 9 - Prob. 10RCCh. 9 - Prob. 11RCCh. 9 - Prob. 1AAECh. 9 - Prob. 2AAECh. 9 - Prob. 3AAECh. 9 - Prob. 4AAECh. 9 - Prob. 5AAECh. 9 - Prob. 6AAECh. 9 - Prob. 7AAECh. 9 - Prob. 8AAECh. 9 - If a single twitch of a skeletal muscle fiber...Ch. 9 - Prob. 10AAECh. 9 - Prob. 1GPACh. 9 - Prob. 2GPACh. 9 - Prob. 3GPA
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