Question

During which phase of a twitch in a muscle fiber is tension the greatest? a. resting phase b. repolarization phase c. contraction phase d. relaxation phase

Name: Problem 15, Chapter 10: Anatomy & Physiology
Uploaded: 2020-06-19T18:37:17-08:00
Duration: 52 s
Channel: Joanna Quigley
Description: During which phase of a twitch in a muscle fiber is tension the greatest? a. resting phase b. repolarization phase c. contraction phase d. relaxation phase

    During which phase of a twitch in a muscle fiber is tension the greatest?
a. resting phase
b. repolarization phase
c. contraction phase
d. relaxation phase

Anatomy & Physiology

J. Gordon Betts,… 1st Edition

Chapter 10, Problem 15

Instant Answer

Solved by Expert Joanna Quigley

06/19/2020

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Initially, the muscle fiber is at rest, which is the resting phase. Show more…

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During which phase of a twitch in a muscle fiber is tension the greatest? a. resting phase b. repolarization phase c. contraction phase d. relaxation phase

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Key Concepts

Contraction Phase

The contraction phase is the period during which the muscle fiber generates the highest tension due to the active interaction between actin and myosin filaments in the sarcomere. This phase reflects maximal cross-bridge formation and force production, making it the phase of greatest tension in a muscle twitch.

Muscle Twitch

A muscle twitch is the response of a muscle fiber to a single stimulus, exhibiting distinct phases including an initial latent period, a contraction phase where force is generated, and a relaxation phase where the tension diminishes. This concept is fundamental in understanding how muscles react to nerve impulses and produce movement.

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