Explanation Reason for correct answer: Option d. is given as “none of above.” Muscle movement occurs due to the interaction of thin and thick filaments. There is no change in the length and position of the filaments. During the muscle contraction, myosin binds to the actin filament and pulls the filament toward the center of the sarcomere. It is just like stretching a spring, which returns to its original shape after release. Reason for incorrect answer: Option a. is given as, “thick filaments shorten.” The thick filament does not shorten the sarcomere. During the muscle contraction, the myosin of the thick filament binds to actin for the sliding movement. Hence, option a...

10th Edition

ISBN: 9781305967359

Author: STARR

Publisher: CENGAGE L

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Chapter 32, Problem 9SA

Summary Introduction

Introduction:

A mature skeletal muscle fiber has thousands of threadlike proteins which are called myofibrils. These myofibrils are arranged as a contractile unit to form sarcomere. The sarcomere has a thick filament, which consists of motor protein myosin, and the thin filament of sarcomere has actin as a motor protein.

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Chapter 32 Solutions

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

Ch. 32 - Prob. 1SA Ch. 32 - Prob. 2SA Ch. 32 - Prob. 3SA Ch. 32 - Prob. 4SA Ch. 32 - Prob. 5SA Ch. 32 - Prob. 6SA Ch. 32 - Prob. 7SA Ch. 32 - Prob. 8SA Ch. 32 - Prob. 9SA Ch. 32 - ATP for muscle contraction can be provided by...

Ch. 32 - Prob. 11SA Ch. 32 - Prob. 12SA Ch. 32 - Cheetahs and human sprinters tend to have a high...Ch. 32 - Prob. 14SA Ch. 32 - Prob. 15SA Ch. 32 - Prob. 1CT Ch. 32 - After death, a person no longer makes ATP, so...Ch. 32 - Continued strenuous activity can cause lactate to...

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Cell Differentiation | Genetics | Biology | FuseSchool; Author: FuseSchool - Global Education;https://www.youtube.com/watch?v=gwAz_BtVuLA;License: Standard YouTube License, CC-BY

Solution Summary: The author explains that a mature skeletal muscle fiber has thousands of threadlike proteins called myofibrils, which form sarcomere. Muscle movement occurs due to the interaction of thin and thick filaments

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Chapter 32 Solutions