B3.3 Muscle and motility

Front

Motile

Back

Capable of movement.

Example: birds, fish, mammals

Front

Sessile

Back

Fixed in one place; immobile.

Example: corals, barnacles, plants

Front

Movement

Back

The act of changing physical location or position.

Front

Locomotion

Back

The ability to move from one place to another.

Front

Filter-feeding

Back

A method of feeding where small particles are filtered from water.

Front

Sarcomere

Back

The basic unit of a muscle's cross-striated myofibril.

Front

Actin

Back

A protein that forms (together with myosin) the contractile filaments of muscle cells.

attached to the z-disc

Front

Myosin

Back

A protein that, with actin, contracts and relaxes muscle fibers.

thicker, occupy the end of the sarcomere

Front

Contraction

Back

The process in which a muscle becomes or is made shorter and tighter.

Front

Myofibrils

Back

Any of the elongated contractile threads found in striated muscle cells.