Energy-requiring process that moves material across a cell membrane against a concentration difference

the movement of substances across a cell membrane without the use of energy by the cell

Movement of molecules from an area of higher concentration to an area of lower concentration.

Diffusion of water through a selectively permeable membrane

process by which a cell takes material into the cell by infolding of the cell membrane

Process by which a cell releases large amounts of material

A part of the cell containing DNA

Cell organelle that creates proteins

Organelle that is the site of ATP (energy) production

An organelle found in plant and algae cells where photosynthesis occurs

Cell organelle that stores materials such as water, salts, proteins, and carbohydrates

The membrane at the boundary of every cell that acts as a selective barrier

A rigid structure that surrounds the cell membrane and provides support to the cell

Hairlike projections that extend from the plasma membrane and are used for movement

A long, whip-like filament that helps in cell mobility. Many bacteria are flagellated, and sperm are flagellated.

A temporary, foot-like extension of a cell, used for motion or engulfing food

A structure some unicellular organisms uses to detect light

A type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles.

A type of cell with a membrane-enclosed nucleus and membrane-enclosed organelles.

A cell structure that carries out a specific function within the cell