Biology Chapter: Ionic Charge and Membrane Diffusion

The overall positive or negative charge of a solution in a specific area.

The movement of molecules from an area of high concentration to an area of low concentration.

Proteins within a cell membrane that allow the passage of inorganic ions.

The difference in concentration of a substance between two areas.

The difference in electrical charge between two areas.

The influence of the concentration difference across a membrane on the movement of ions, like how a crowded room influences the movement of people.

The effect of the electrical potential difference across a membrane on the movement of ions, like how a magnet pulls a metal object.

Channels that act as receptors for extracellular signals and open when they bind to specific molecules, allowing the passage of selected ions.

The process of gas exchange that occurs in the lungs of air-breathing animals, where fresh air is inhaled and stale air is exhaled.

The ability of an animal, like a tuna, to efficiently utilize oxygen from water pumped over their gills.

A type of gas exchange where the flow of blood and the flow of the respiratory medium move in the same direction.

A type of gas exchange where the flow of blood and the flow of the respiratory medium move in opposite directions.

The partial pressure of oxygen in the blood leaving the breathing organ is lower than the partial pressure of oxygen in the exhaled medium.

The partial pressure of oxygen in the blood leaving the breathing organ is higher than the partial pressure of oxygen in the exhaled medium.

The difference in partial pressure of oxygen between the respiratory medium and the blood.