Foundations. 5: Sliding Filament Theory

Which two molecules are integral for muscular contraction?

• Phosphate

• ATP

• Calcium

• Potassium

What molecule frees up the actin and myosin binding site?

• Sodium

• Potassium

• Calcium

• Magnesium

What does calcium bind with to free up the actin and myosin binding site?

• Tropomyosin

• Tropon

• Troponin M

• Troponin C

What two things happen to the myosin head when ATP is split?

• It is energized

• Becomes reoriented

• Myosin head rotates

• Myosin release actin

Where is calcium stored?

• Sarcoplasmic reticulum

• sarcomere

• Attached to myosin

• Troponin C

What is formed when actin and myosin bind together?

• Bond

• Cross Bridge

• Power Stroke

• hydrolysis

• Excitation contraction coupling

A concentric contraction occurs when what action takes place?

• Titin stretches

• Actin binds with myosin

• Cross Bridge

• Power Stroke