Leach 5

Front

What is the primary function of the muscular system?

Back

The primary functions of the muscular system include movement of the body, maintaining posture, and heat production.

Front

Which membrane surrounds an individual muscle fiber?

Back

The endomysium is the membrane that covers an individual muscle fiber.

Front

In a muscle contraction, what is the role of the prime mover?

Back

The prime mover is the muscle that provides the primary force for a specific movement.

Front

What is an antagonist muscle?

Back

An antagonist muscle opposes the action of the prime mover during a movement.

Front

Define a crossbridge in muscle contraction.

Back

A crossbridge is formed when myosin heads bind to actin filaments during muscle contraction.

Front

What is the correct order of muscle structure from smallest to largest?

Back

The correct order is myofibril, muscle fiber, fascicle, muscle.

Front

What is the role of calcium in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the function of the epimysium?

Back

The epimysium is a connective tissue that surrounds the entire muscle.

Front

What is a fascicle in muscle anatomy?

Back

A fascicle is a bundle of muscle fibers (cells) within a muscle.

Front

What is the difference between insertion and origin in muscle anatomy?

Back

The origin is the fixed attachment point of a muscle, while the insertion is the movable attachment point.