Why is muscle 1 more powerful than muscle 4? The graphs below show the force-versus-shortening-velocity and power-versus-shortening-velocity curves for four muscles in the human lower extremity. Notethat these curves show this relationship only for shortening activations (positiveshortening velocities), not lengthening activations. And, note that the valuesdisplayed on the axes of the graphs are absolute (not normalized) values of force,power, and velocity.These graphs apply to the next three questions.Force vs Shortening VelocityPower vs Shortening Velocity1,5004001,2003002 9002006001003000.00.51.01.52.00.00.51.01.52.0Shortening Velocity (m/s)Shortening Velocity (m/s)muscle 1muscle 3muscle 2muscle 4Force (N)Power (W)

The shape of the force-velocity (F-V) relationship affects many aspects of muscle physiology,…

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Why is muscle 1 more powerful than muscle 43

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 2SQE

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Concept explainers

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.

Question

Why is muscle 1 more powerful than muscle 4?

The graphs below show the force-versus-shortening-velocity and power-versus-
shortening-velocity curves for four muscles in the human lower extremity. Note
that these curves show this relationship only for shortening activations (positive
shortening velocities), not lengthening activations. And, note that the values
displayed on the axes of the graphs are absolute (not normalized) values of force,
power, and velocity.
These graphs apply to the next three questions.
Force vs Shortening Velocity
Power vs Shortening Velocity
1,500
400
1,200
300
2 900
200
600
100
300
0.0
0.5
1.0
1.5
2.0
0.0
0.5
1.0
1.5
2.0
Shortening Velocity (m/s)
Shortening Velocity (m/s)
muscle 1
muscle 3
muscle 2
muscle 4
Force (N)
Power (W)

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