Muscle Anatomy Review

Front

What is the thick protein myofilament in muscle fibers?

Back

Myosin

Front

What are the two types of proteins that make up myofibrils?

Back

Actin and Myosin

Front

How many sarcomeres are typically shown in a muscle fiber diagram?

Back

5

Front

What is the thin protein myofilament in muscle fibers?

Back

Actin

Front

What is the connective tissue surrounding individual muscle fibers?

Back

Endomysium

Front

What is the connective tissue that surrounds a fascicle of muscle fibers?

Back

Perimysium

Front

What is the outermost layer of connective tissue surrounding an entire muscle?

Back

Epimysium

Front

What is the functional unit of a muscle fiber?

Back

Sarcomere

Front

What role does acetylcholine play in muscle contraction?

Back

It is a neurotransmitter that stimulates muscle contraction by binding to receptors on the muscle cell membrane.

Front

What is the function of tropomyosin in muscle contraction?

Back

It blocks the binding sites on actin, preventing myosin from attaching when the muscle is relaxed.