Sliding Filament Theory #2

Front

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

Back

Sarcolemma

Front

Which protein forms thick filaments in muscle contraction?

Back

Myosin

Front

What are muscles that increase the angle between ventral surfaces of the body called?

Back

Extensors

Front

What organelle stores acetylcholine (ACh) in the axon?

Back

Vesicle

Front

What are the thin filaments in a myofibril made of?

Back

Actin

Front

What is the functional unit of a muscle fiber called?

Back

Sarcomere

Front

What is the role of troponin in muscle contraction?

Back

Troponin binds calcium ions and helps regulate muscle contraction.

Front

What is the role of tropomyosin in muscle contraction?

Back

Tropomyosin blocks the binding sites on actin for myosin.

Front

What is the process called when a muscle fiber is stimulated to contract?

Back

Excitation-contraction coupling.

Front

What is the primary energy source for muscle contraction?

Back

Adenosine triphosphate (ATP).