Reviewing the Anatomy of a Skeletal Muscle

Front

What is the part of the sarcomere that is primarily composed of thin filaments?

Back

Actin

Front

What does the endomysium cover?

Back

Muscle fiber.

Front

What is the name of the space between the axon terminal and a muscle fiber?

Back

Synaptic cleft.

Front

What does the epimysium cover?

Back

Muscle.

Front

Which part of the sarcomere contains only thick filaments?

Back

H zone.

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 function of tropomyosin in muscle fibers?

Back

Tropomyosin blocks the binding sites on actin, preventing contraction when calcium is not present.

Front

What structure stores calcium ions in muscle cells?

Back

Sarcoplasmic reticulum.

Front

What is the term for the muscle cell membrane?

Back

Sarcolemma.