Explanation Factors responsible for the contraction of muscles are given below: The process of contraction of muscles is based on the number of contraction of muscle fibers, development of tension in individual muscle fibers, a stimulation frequency of muscle fibers, the condition of muscle whether it is fatigue or not and the load experienced by the muscle. The tension in the muscle fibers goes up as the contraction of muscle fibers rate increases. A single motor neuron stimulates all the skeletal muscles which constitute the “motor unit.” The motor units are activated after they receive the signals from the brain or spinal cord. The strong contractions result from the recruitment of a number of motor neurons. A “ simple twitch” is a kind of response which is generated by skeletal muscles when activated by an electrical signal. At the time of primary contraction if the second signal contributes as well then the process is called “summation...

10th Edition

ISBN: 9781285423586

Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher: Cengage Learning

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Question

Chapter 40.3, Problem 12LO

Summary Introduction

To Describe: The factors that influence muscle contraction.

Introduction: Contraction of muscles takes place when the sarcomere starts shortening down. The changes take place in the length of sarcomere which leads to the extension and flexion of the muscle fibers. Various factors are responsible for the process of muscle contraction to take place which later leads to the process of motion of muscles. Multiple units of sarcomere clubbed in the end to end direction for the conduction of the signals of muscle contraction.

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Chapter 40.3, Problem 11LO

Chapter 40.3, Problem 1C

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Solution Summary: The author explains the factors that influence muscle contraction, such as the length of the sarcomere, tension in individual muscle fibers, fatigue, and the load experienced by the muscle.

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