Exam 9: Muscular System

Match each muscle with its corresponding description or location. -One of the muscles used to close the jaw

Match each muscle to its corresponding location or description. -Primary calf muscle

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

The model that explains how a muscle contracts is called the sliding filament model.

Explain the microscopic structure of the skeletal muscle.

Describe the progression of Duchenne muscular dystrophy.

Muscle tone maintains posture.

Explain why Duchenne muscular dystrophy usually affects boys.

Match each term with its corresponding definition or description. -The movement that decreases the angle between two bones

Explain the sliding filament theory of muscle contraction.

Which of the following contractions is seen in an isolated muscle fiber in the laboratory but plays a minimal role in normal muscle activity?

Match each muscle with its corresponding description or location. -Pair of muscles that allow a person to flex the head to the chest

In an isotonic contraction, the muscle itself actually shortens.

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

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

Match each term with its corresponding definition or description. -Protein that makes up the thin myofilament

Shivering helps a person with hypothermia because muscle contractions produce heat.

Muscle cells will contract slightly for a weak stimulus and much more forcefully for a stronger stimulus.

What makes up a motor unit, and what is the neuromuscular junction?

The "heads" of which molecules form crossbridges during muscle contraction?