Sliding Filament Theory

The functional unit of skeletal muscle is called what?

• Sarcolemma

• Sarcoplasm

• Sarcowire

• Sarcomere

What are the thin myofilaments of a sarcomere called?

• Myosin

• Tropomyosin

• Actin

• Troponin

What are the thick myofilaments in a sarcomere called?

• Troponin

• Myosin

• Tropomyosin

• Actin

Calcium ions bind to which of the following to expose the myosin binding sites?

• Troponin

• Actin

• Terminal Cisternae

• Tropomyosin

What is created when you hydrolyze ATP?

• Carbonic Acid

• AMP and ADP

• ADP and inorganic phosphate

• Two pyruvates

What is released during when the myosin head creates a cross bridge with actin?

• Calcium ions

• ATP

• inorganic phosphate

• ADP

What is released during the power stroke phase of the sliding filament theory?

• AMP

• ADP

• ATP

• Inorganic phosphate

What is required to detach the myosin head from the myosin binding site?

• Calcium ions

• Inorganic phosphate

• ATP

• ADP

The muscle relaxes when excess Calcium is returned to the sarcoplasmic reticulum.

• True

• False

Once Troponin returns to its normal location, Tropomysin can also return to his location - UNCOVERING the actin for the myosin to attach

• True

• False