Unit 4: Homeostasis and Transport Keystone Vocabulary Review

The movement of particles from an area of low concentration to an area of high concentration that uses energy provided by ATP or a difference in electrical charges across a cell membrane

Proteins embedded in the plasma membrane involved in the movement of ions, small molecules, and macromolecules into and out of cells; Also known as transport proteins

The basic unit of structure and function for all living organisms. Cells have three common components: genetic material, cytoplasm, and a cell membrane. Eukaryotic cells also contain specialized organelles

The measure of the amount or proportion of a given substance when combined with another substance

The graduated difference in concentration of a solute per unit distance through a solution

The movement of particles from an area of high concentration; a natural result of kinetic molecular energy

A process in which a cell engulfs extracellular material through an inward folding of its plasma membrane

An organelle, containing folded membranes and sac, responsible for the production, processing, and transportation of materials for use inside and outside a eukaryotic cell

A type of organism composed of one or more cells containing a membrane-bound nucleus, specialized organelles in the cytoplasm, and a mitotic nuclear division cycle

A process in which a cell releases substances in the cytoplasm, and a mitotic nuclear division cycle

Located outside the cell

A process in which substances are transported across a plasma membrane with the concentration gradient with the aid of a carrier (transport) proteins; does not require the use of energy

An organelle found in eukaryotic cells responsible for the final stages of processing proteins for release by the cell

The regulatory process in which an organism regulates its internal environment

A regulatory mechanism that contributes to maintaining a state of equilibrium (example - thermoregulation, water regulation, and oxygen regulation)