Exam 17: Muscle Contraction

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

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

The neurotransmitter(s) secreted at the motor end plates of skeletal muscles is (are):

A satellite cell in a muscle can become active:

Match each term with its corresponding description regarding the sliding-filament theory. -Compound that supplies the energy for muscle contraction

The ion necessary for cross-bridging is:

When the sarcomere contracts, the I-bands become smaller.

A decrease in muscle size is termed:

The three phases of muscle contraction are contraction, relaxation, and recovery.

Because the heart is in almost constant contraction, its muscle cells have larger sarcoplasmic reticula that can hold higher concentrations of calcium ions.

Explain the process of anaerobic respiration in the muscle. What is the oxygen debt, and how is it "repaid"?

Which type of muscle does not have T-tubules?

Treppe is also called:

Muscle cells are called fibers, because they are long and thin. They can be 40 mm long but only about 10 mm in diameter.

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

Contraction of a small fraction of the total number of fibers in a muscle produces muscle tone.

White fibers are also called _____ fibers.

Actin, troponin, and tropomyosin are present on the thick myofilament.

The protein molecule that has heads jutting out for cross-bridging is:

Both the skin, or integument, system and the muscle system are important in maintaining the body temperature. The skin function is homeostatic in nature. Explain why the muscle function is not.