Exam 17: Muscle Contraction

Muscle has the ability to store oxygen in myoglobin and store glucose as glycogen.

Because of the elasticity of the muscle fiber, as soon as the contraction stops, the sarcomere goes back to its precontraction length.

Glucose can be stored in the muscle as:

Smooth, sustained contractions are called treppe.

The protein molecule that has heads jutting out for cross-bridging is called myosin.

The liver has the ability to convert lactate back into glucose.

Tetanus will not occur in an individual with an up-to-date tetanus vaccination.

The smallest contractile unit of muscle is a:

The anabolism of protein by muscle cells produces heat for the body.

Which of the following proteins found in myofilaments contains the cross-bridges?

Recruitment is the term used to describe the addition of more motor units to allow a muscle to increase its strength of contraction.

A muscle using anaerobic respiration would lower the pH of the blood passing through the muscle.

Myofibrils make up myofilaments.

Bundles of fine fibers that extend lengthwise along muscle fibers are called:

The T-tubules in the heart form dyads rather than the triads found in skeletal muscles.

Explain how the treppe, or staircase, phenomenon applies to pre-exercise warm-up.

The cell membrane of a muscle fiber is called the sarcolemma.

Isometric contraction is a contraction in which the tone or tension within a muscle remains the same, but the length of the muscle changes.

Match each term with its corresponding description regarding the sliding-filament theory. -Protein that directly prevents the formation of cross-bridges in the sarcomere

Explain the role of ATP in muscle contraction.