Muscle Quiz #2

___are thin filaments.

• troponin

• tropomyosin

• actin

• myosin

___are thick filaments.

• actin

• myosin

• troponin

• tropomyosin

___forms a crossbridge with actin.

• actin

• myosin

• calcium

• ATP

___provides energy for muscle contraction and relaxation.

• cAMP

• ADP

• ATP

• M line

What two chemicals are necessary for muscle contraction to occur?

• Niacin and Potassium

• Calcium and ATP

• Sodium and Potassium

• Ach and Potassium

Cellular respiration that occurs without oxygen present is called

• aerobic

• anaerobic

• isotonic

• isometric

Anaerobic respiration results in "oxygen debt" in the form of ________.

• ATP

• lactic acid

• pyruvic acid

• creatine

What state is the sarcomere in #1

• Relaxed

• Contracting

• Fully Contracted

• None of the above

What state is the sarcomere in #2

• Relaxed

• Contracting

• Fully Contracted

• None of the above

What is the sliding filament theory?

• A description of the shapes of muscles

• A theory explaining that lengthening the sarcomeres causes a muscle to move

• An explanation for how muscle contraction occurs

• A description of how myosin filaments move.