Biomechanics of Skeletal Muscle Quiz

Muscle Tissue

• Connective tissue is the most abundant tissue in the human body.

Muscle Types

• There are three types of muscles in the human body.

Skeletal Muscle

• Skeletal muscle attaches to the skeleton via tendons.
• Skeletal muscle accounts for approximately 40% of the total body weight.
• There are over 600 skeletal muscles in the human body, with many found in pairs on the right and left sides.

Smooth Muscle

• Smooth muscle is composed of spindle-shaped cells with a single nucleus.

Muscle Structure

• Each muscle fiber is surrounded by a layer of connective tissue called endomysium.
• The structural unit of skeletal muscle is the sarcomere.
• Myofibrils are invested by the sarcolemma.
• The sarcolemma connects with the sarcomeric Z lines via costameres.

Muscle Function

• The main function of skeletal muscles is to produce movement by contracting and relaxing.
• Dynamic work performed by skeletal muscles involves generating force to produce movement.
• The primary role of static work performed by skeletal muscles is to maintain posture and stabilize joints.

Tendons and Connective Tissue

• Tendons form connections between muscles and bones.
• Collagen fibers in the epimysium, perimysium, and tendons act as a supportive framework for muscles.

Muscle Fiber Structure

• The basic microscopic structure of a muscle fiber is made up of myofibrils, sarcolemma, and sarcoplasm.