Muscle Contraction Flashcard

Front

What is the smallest unit of a muscle that can contract?

Back

Sarcomere

Front

What are the two types of myofilaments in muscle contraction?

Back

Thin filaments (Actin) and Thick filaments (Myosin)

Front

Which myofilament is known as the thin filament?

Back

Actin

Front

Which myofilament is known as the thick filament?

Back

Myosin

Front

What structure in the sarcomere is responsible for muscle contraction?

Back

The interaction between Actin and Myosin filaments.

Front

What is the role of Myosin in muscle contraction?

Back

Myosin has heads that bind to Actin and pull it, causing contraction.

Front

What is the I band in a sarcomere?

Back

The I band is the part of the sarcomere that contains only thin filaments (Actin).

Front

What is the A band in a sarcomere?

Back

The A band is the part of the sarcomere that contains both thick (Myosin) and thin (Actin) filaments.

Front

What is the Z line in a sarcomere?

Back

The Z line is the boundary between adjacent sarcomeres and anchors the thin filaments.

Front

What is the H zone in a sarcomere?

Back

The H zone is the central part of the A band where there are only thick filaments (Myosin).