Q. 38 Skeletal muscles can only produc... [FREE SOLUTION]

Chapter 38: Q. 38 (page 1121)

Skeletal muscles can only produce a mechanical force as they are contracted, but a leg flexes and extends while walking. How can muscles perform this task?

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Due to their ability to work in pairs, muscles can power movement and other activities involving opposing motions.
The leg flexes around the knee joint when walking because the hamstring muscle contracts first.
The hamstring relaxes and expands as the foot touches the ground, while the quadriceps muscle contracts to straighten the leg.

Skeletal muscles are also referred to as voluntary muscles because they are controlled by our will.
Asingleskeletalmusclemightconsistofhundredsoreventhousandsofmusclefibresthathavebeenbundledtogetherandcoveredinconnectivetissue.
you can inhale and exhale at will by expanding and contracting your chest cavity.
Shifting the bones in various body sections.
Retaining joints in position and safeguarding them.

The ability of a muscle to perform work is referred to as muscular performance.
Strength, power, and endurance are the three main components of muscular performance.
Movement, support, protection, heat production, and blood circulation are the primary roles of the muscular system.

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