Muscle Cells (Sarcomere)

Front

Thin filaments that form the I band of the sarcomere

Back

Actin

Front

A muscle cell is called a:

Back

myocyte

Front

The contractile unit of a muscle fiber:

Back

sarcomere

Front

A bundle of muscle fibers is called:

Back

fascicle

Front

The border between two sarcomeres is the:

Back

Z line

Front

What is the role of myosin in muscle contraction?

Back

Myosin interacts with actin to facilitate muscle contraction through the sliding filament mechanism.

Front

What is the function of the sarcolemma?

Back

The sarcolemma is the cell membrane of a muscle cell, responsible for maintaining the cell's integrity and facilitating the conduction of electrical impulses.

Front

What is the significance of the A band in a sarcomere?

Back

The A band contains the entire length of myosin filaments and is the region where thick and thin filaments overlap, playing a crucial role in muscle contraction.

Front

What is the H band in a sarcomere?

Back

The H band is the region in the A band where there is no overlap between actin and myosin filaments, appearing lighter under a microscope.

Front

What is the function of the Z-disc in a sarcomere?

Back

The Z-disc anchors the thin filaments (actin) and defines the boundaries of each sarcomere.