Muscle Contraction

Front

What is necessary for the myosin to release the actin?

Back

ATP

Front

Which of the following statements correctly explains the sliding filament model?

Back

Myosin head attaches to a binding site on an actin filament, forming a cross bridge.

Front

What are thick filaments in muscle contraction?

Back

Myosin

Front

When a muscle is relaxed and in a lengthened position, what is the relationship between actin filaments?

Back

They are far apart from each other.

Front

What is our current model of muscle contraction called?

Back

Sliding Filament Theory

Front

What role does ATP play in muscle contraction?

Back

ATP provides the energy required for myosin to detach from actin.

Front

What happens during the power stroke in muscle contraction?

Back

The myosin head pivots, pulling the actin filament toward the center of the sarcomere.

Front

What is the function of calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the structure that connects muscle to bone?

Back

Tendon

Front

What is the basic unit of muscle contraction?

Back

Sarcomere