Exam 9: Muscular System

During a muscle contraction, the Z lines of that muscle fiber come closer together.

Moving a body part away from the midline of the body is called

The autoimmune disorder of the muscular system characterized by muscle weakness, especially in the face and throat, is called

Match each muscle to its corresponding location or description. -One of the three layered muscles on the side of the abdominal wall

Both antagonist muscles and synergist muscles act to oppose the movement of the prime mover.

Explain muscle fatigue and oxygen debt, and describe how oxygen debt is "paid."

The muscle responsible for bending the elbow has its insertion in the forearm.

Match each term with its corresponding definition or description. -Movement that increases the angle between two bones

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

The muscle does not shorten in an isometric contraction, so there is no tension on the muscle.

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

Lactic acid is produced when insufficient oxygen is available to meet the energy demands of muscle cells.

Twitch contractions are normally used in most actions.

Explain the roles of the prime mover, the synergist, and the antagonist in muscle contraction.

Give an example of a sport or activity that benefits from strength exercise. Explain your answer.

Explain the different effects that strength training and endurance training have on a muscle.

Which of the following is not a primary function of the muscular system?

Match each muscle with its corresponding description or location. -Can be referred to as the "smiling muscle"

In the anatomical position, the hands are supinated.

The result of strength training is muscle atrophy.