U5 Sliding Filament Theory

Front

What is the sliding filament theory?

Back

An explanation for how muscle contraction occurs.

Front

What type of muscle is found in the heart?

Back

Cardiac muscle.

Front

What is a crossbridge in muscle contraction?

Back

Where myosin binds to actin.

Front

What structure stores calcium in the muscle cell?

Back

Sarcoplasmic Reticulum.

Front

What is the plasma membrane of a skeletal muscle cell called?

Back

Sarcolemma.

Front

What are the two main proteins involved in muscle contraction?

Back

Actin and myosin.

Front

What role does calcium play in muscle contraction?

Back

Calcium binds to troponin, allowing myosin to bind to actin.

Front

What is the functional unit of a muscle called?

Back

Sarcomere.

Front

What happens to the sarcomere during muscle contraction?

Back

The sarcomere shortens as actin filaments slide over myosin filaments.

Front

What is the role of ATP in muscle contraction?

Back

ATP provides the energy needed for myosin to pull actin.