Exam 9: The Muscular System

When the elbow is bent,the triceps brachii is the prime mover.

Which type of muscle tissue specializes in contraction or shortening?

The main effect of strength training is muscle atrophy.

When a muscle contracts,its insertion bone moves toward its origin bone.

Tendons attach muscle to bone at both the origin and insertion sites.

Match each term with its corresponding definition or description. -moving part of the body toward the midline of the body

Endurance training results in

Muscle tone maintains posture.

Match each term with its corresponding definition or description. -turning the hand so the palm is facing posteriorly

Both calcium and ATP are needed for a muscle to contract.

The movement that is opposite of flexion is

The thick myofilaments in a skeletal muscle are composed of actin.

Twitch contractions are the normal muscle contraction used in most actions.

All the motor neurons that stimulate a single muscle are referred to as a motor unit.

Trying to lift a 500-pound weight would result in what type of muscle contraction?

Name and explain the movements produced by skeletal muscle contraction.

Match each term with its corresponding definition or description. -movement that elevates the top of the foot so the toes are pointing upward

Explain the microscopic structure of the skeletal muscle.

Bursae and tendon sheaths perform the same function.

If the muscles of a weightlifter and a marathon runner were compared,the marathon runner would have