Muscle System Assessment Review

The striations seen in skeletal muscle are actually alternating dark A and light I bands.

• True

• False

The binding of calcium to which molecule causes the myosin binding sites to be exposed?

• Tropomyosin

• Actin

• myosin

• troponin

A myosin head binds to which molecule to form a cross bridge?

• Actin

• Myosin

• Troponin

• Tropomyosin

What causes the myosin head to disconnect from actin?

• Binding of troponin

• Hydrolysis of ATP

• Binding of ATP

• Binding of Calcium

What causes the power stroke?

• Hydrolysis of ATP

• Release of ADP and Pi

• Calcium

• Binding of ATP

Which of the following processes produces the most ATP?

• Hydrolysis of creatine phosphate

• Krebs cycle and oxidative phosphorylation

• Glycolysis

Tags

NGSS.HS-LS2-3

The A band within a myofibril is indicated by ________.

• A

• B

• C

• D

What creates the alternating light and dark bands that provides the striation pattern on skeletal muscle tissue?

• Sarcoplasm and sarcolemma

• Z discs and H zones

• Think filaments and myosin heads

• A bands and I bands

Which one of the following is composed mostly of the protein myosin?

• Thin filaments

• Thick filaments

• Z discs

• all myofilaments

The I band within a skeletal muscle fiber is indicated by ________.

• A

• B

• C

• D