a) Describe why the first steps for a low force contraction in both muscles are smaller than the later ones in the context of motor units and force production.
a) Describe why the first steps for a low force contraction in both muscles are smaller than the later ones in the context of motor units and force production.
Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter6: The Muscular System
Section: Chapter Questions
Problem 10SQ
Related questions
Question
![2. We discussed how muscle spindles allow for precision of movement as a muscle lengthens, and
particular muscles which require more precise movements will contain more spindles.
In addition to this precision control over muscle length, there are other differences between
muscles which enable more precision in how much force is generated. Consider the two graphs
below which depict force generated by two different muscles as additional motor units are
recruited.
Force
Muscle A
Load
Force
Muscle B
Load
a) Describe why the first steps for a low force contraction in both muscles are smaller than the
later ones in the context of motor units and force production.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fed9edc91-cd6d-46c8-82ee-eccaad841b3e%2F79bd4115-2cfa-4df6-b4a4-3d8e50af8f64%2F36jky49_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2. We discussed how muscle spindles allow for precision of movement as a muscle lengthens, and
particular muscles which require more precise movements will contain more spindles.
In addition to this precision control over muscle length, there are other differences between
muscles which enable more precision in how much force is generated. Consider the two graphs
below which depict force generated by two different muscles as additional motor units are
recruited.
Force
Muscle A
Load
Force
Muscle B
Load
a) Describe why the first steps for a low force contraction in both muscles are smaller than the
later ones in the context of motor units and force production.
![b) Consider and describe the Physiology behind how muscle B has less precision in generated
force than muscle A. Ensure you describe the motor units themselves and how they may be
different between the muscles.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fed9edc91-cd6d-46c8-82ee-eccaad841b3e%2F79bd4115-2cfa-4df6-b4a4-3d8e50af8f64%2F8gghx8g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:b) Consider and describe the Physiology behind how muscle B has less precision in generated
force than muscle A. Ensure you describe the motor units themselves and how they may be
different between the muscles.
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