Module #4 Exam: Muscles

Front

How are slow twitch fibers and fast twitch fibers different?

Back

Fast twitch fibers contain a high amount of myoglobin.

Front

Which of the following represents a muscle group pair in the human body? biceps and trapezius, hamstrings and gluteus, rectus abdominis and erector spinae, quadriceps and deltoid

Back

rectus abdominis and erector spinae

Front

Which of the following correctly lists structures in a muscle from largest to smallest?
myofibrils, fascicles, actin,
fascicles, myofibrils, myosin,
actin, myosin, sarcomeres,
sarcomeres, myofibrils, actin

Back

fascicles, myofibrils, myosin

Front

What is the definition for a static contraction?

Back

a contraction that develops a tension where the muscle length remains the same

Front

Which action demonstrates increasing the resistance of a movement by lengthening the distance between the joint and the movement? Options: doing a sit up with arms on the forehead after sitting up with arms behind head, rising from a wide-leg squat after rising from a closed leg squat, turning in a circle with arms against the body after turning with arms extended, lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

Back

rising from a wide-leg squat after rising from a closed leg squat

Front

Which of the following activities would have the highest excessive momentum? wrestling

Back

wrestling

Front

How many different types of fibers do muscles have?

Back

two

Front

Which attachment is NOT a way muscles can be attached to bone? Options: with a fibrous tissue, with a tendon, directly to bone

Back

with a nerve ending

Front

When a muscle contracts in order to hold parts of the body steady and maintain a safe or stable position, it is acting as a

Back

fixator.

Front

Which statement best defines a motor unit? Options: single nerves found in each muscle, a nerve supplying a muscle originating from the spinal cord, a motor nerve and the muscle cells it stimulates, branches located in each individual muscle cell

Back

a motor nerve and the muscle cells it stimulates