McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test

1. Review the animation and answer the following questions.

All striated muscle has the same basic structure. From larger to smaller, the correct order of the following is

A. muscle, fiber, fascicle, myofibril.
B. muscle fascicle, myofibril, fiber.
C. muscle, fascicle, fiber, myofibril.
D. muscle, myofibril, fascicle, fiber.

2. The striped appearance of striated muscle is caused by A. the regular arrangement of myosin and actin filaments.
B. refraction of light through the skin.
C. color differences in the myofibrils which make up the fiber.
D. the regular arrangement of fibers within a fascicle.

3. Muscle contraction is due to A. constriction of blood into the muscle tissue.
B. myosin filaments sliding past other myosin filaments.
C. actin filaments sliding past other actin filaments.
D. actin and myosin filaments sliding past each other.

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