Cell Transport Flashcards

Front

Active Transport

Back

Movement of molecules across the cell membrane using energy (ATP), usually against the concentration gradient.

Front

Amoeba

Back

A single-celled organism that moves and eats using extensions of its cytoplasm called pseudopodia ('false feet').

Front

Cell Membrane

Back

The thin, flexible barrier around a cell that controls what enters and leaves the cell.

Front

Channel Protein

Back

A protein in the cell membrane that forms a passageway for certain molecules to move through.

Front

Concentration

Back

How much solute is present in a solution compared to the amount of solvent.

Front

Concentration Gradient

Back

A difference in concentration of a substance across a space (more on one side than the other).

Front

Endocytosis

Back

The process where the cell membrane folds inward to bring substances into the cell.

Front

Exocytosis

Back

A process where large molecules are released from the cell when a vesicle fuses with the membrane.

Front

Facilitated Diffusion

Back

Molecules move from high to low concentration with help from a protein in the membrane.

Front

Hypertonic

Back

A solution with more solute outside the cell; water leaves the cell and the cell shrinks.