Exam 17: Muscle Contraction

The liver has the ability to convert lactic acid back into glucose.

The plasma membrane of a muscle fiber is called the:

Only striated and cardiac muscles have triads; smooth muscles do not contain T-tubules.

The motor end plate makes up part of the:

Myosin heads detach from the actin molecule when ATP attaches to it.

Smooth, sustained contractions are called treppe.

Muscle pain may also be referred to as muscular dystrophy.

The thin myofilament is myosin, whereas the thick myofilament is actin.

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

Duchenne (pseudohypertrophic) muscular dystrophy is the most common type of muscular dystrophy.

Eccentric muscle contractions actually result in the lengthening of the muscle.

During an isotonic contraction, the tension produced by the myosin cross-bridges cannot overcome the load placed on the muscle.

Muscle fibers have many nuclei, because they are the result of several precursor cells joining together to make a mature muscle fiber.

For continued, efficient nutrient catabolism by muscle fibers, both glucose and oxygen are required.

The myofilament that can be described as bundled golf clubs with their heads sticking out from the bundle is:

A satellite cell in a muscle can become active:

There are three high-energy bonds in an ATP molecule.

In muscles, oxygen can be transferred to the calcium by myoglobin molecules.

The study of muscle activity is called myography.

Slow fibers are also called white fibers, because they contain a low concentration of myoglobin.