Sarcomere Anatomy

Front

What is the thick myofilament in a sarcomere?

Back

Myosin

Front

Which myofilament pulls the other one during muscle contraction?

Back

Myosin pulls actin

Front

What is the name of the line down the middle of the myosin in a sarcomere?

Back

M line

Front

Which part of the sarcomere is known as the dark band?

Back

A band

Front

What is the wall between two different sarcomeres called?

Back

Z line

Front

What is the thin myofilament in a sarcomere?

Back

Actin

Front

What is the region of the sarcomere that contains only actin filaments?

Back

I band

Front

What is the part of the sarcomere that contains both actin and myosin filaments?

Back

A band

Front

What is the area of the sarcomere that contains only myosin filaments?

Back

H zone

Front

What is the function of the Z line in a sarcomere?

Back

It anchors the actin filaments and defines the boundaries of a sarcomere.