Exam 8: Muscle Physiology

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below: -Found in the I band.

Slow-oxidative fibers are type ____________________ fibers in the muscle.

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below: -Has (have) ATPase capacity.

Tetanus occurs when a muscle fiber is stimulated so rapidly that it is not allowed to relax between stimulations, resulting in a smooth, sustained contraction.

Which of the following results in muscle relaxation?

Tropomyosin covers the cross bridge binding sites on the thick filaments when a sarcomere is not contracting.

MATCHING: ART The following questions relate to accompanying figure of the three types of muscle tissue. Use the figure to help match the following characteristics with the correct muscle type. -Could contain gap junctions

In a muscle fiber undergoing maximal tetanic stimulation, the velocity of shortening ____ as the load ____.

This area is involved in planning voluntary motor command:

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code (more than one answer may apply): -Requires a constant supply of oxygen.

Why are you able to repeatedly contract and relax your muscles of respiration, allowing you to breathe in and breathe out?

Fast fibers have higher myosin ATPase activity than slow fibers.

This structure provide a means of rapidly transmitting the action potential to the central portions of the muscle fiber.

Summation

____________________ and ____________________ are referred to as contractile proteins, whereas ____________________ and ____________________ are referred to as regulatory proteins.

The T tubules

According to the sliding filament mechanism of muscle contraction, the muscle fibers of one motor unit slide in closer together between the muscle fibers of adjacent motor units.

The stretch receptors in the central portion of the muscle spindle can be activated by

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Contains actin, myosin, troponin, and tropomyosin.