Q. 38 - Biology

Question

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? 

Step-by-Step Solution

Answer

• 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.

Step : 1 Skeletal muscles and their functions

• Skeletal muscles are also referred to as voluntary muscles because they are controlled by our will.
• A single skeletal muscle might consist of hundreds or even thousands of muscle fibres that have been bundled together and covered in connective tissue.
• 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.

Step : 2 Muscular performance

• 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.