Cell Transport

Cell transport refers to the movement of substances into and out of cells, which is essential for maintaining homeostasis.

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell.

Exocytosis is the process by which cells expel materials in vesicles, releasing them into the external environment.

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules.

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

In a hypertonic solution, water moves out of the cell, causing it to shrink.