PHENOMENA AND PROCESSES Metabolism [G03] Metabolism Biological Transport [G03.143] Biological Transport Biological Transport, Active [G03.143.310] Biological Transport, Active Capillary Permeability [G03.143.330] Capillary Permeability Cell Membrane Permeability [G03.143.335] Cell Membrane Permeability Cytoplasmic Streaming [G03.143.355] Cytoplasmic Streaming Facilitated Diffusion [G03.143.427] Facilitated Diffusion Intestinal Barrier Function [G03.143.464] Intestinal Barrier Function Ion Transport [G03.143.500] Ion Transport Calcium Signaling [G03.143.500.100] Calcium Signaling Protein Transport [G03.143.700] Protein Transport Respiratory Transport [G03.143.775] Respiratory Transport RNA Transport [G03.143.850] RNA Transport Secretory Pathway [G03.143.925] Secretory Pathway Transcytosis [G03.143.962] Transcytosis

Ion Transport - Preferred

Concept UI	M0026035
Scope note	The movement of ions across energy-transducing cell membranes. Transport can be active, passive or facilitated. Ions may travel by themselves (uniport), or as a group of two or more ions in the same (symport) or opposite (antiport) directions.
Preferred term	Ion Transport
Entry term(s)	Transport, Ion

Ion Exchange, Intracellular - Narrower

Concept UI	M0026032
Preferred term	Ion Exchange, Intracellular
Entry term(s)	Exchange, Intracellular Ion Intracellular Ion Exchange

Active Ion Transport - Narrower

Concept UI	M0384361
Scope note	Ion transport that is coupled to an energy-yielding process. When proteins such as ION PUMPS couple transport directly to a chemical or photochemical reaction such as ATP hydrolysis the process is considered primary active transport pumps. Secondary active transport utilizes the voltage and ion gradients produced by the primary transport to drive the cotransport of other ions or molecules. SYMPORTERS may use secondary active transporters to transport ions in the same direction (symport). ANTIPORTERS may use secondary active transporters to transport ions in the opposite direction (antiport).
Preferred term	Active Ion Transport
Entry term(s)	Ion Transport, Active Transport, Active Ion

Uniport - Narrower

Concept UI	M0026034
Preferred term	Uniport

Passive Ion Transport - Narrower

Concept UI	M0384359
Scope note	Ion transport that derives its energy from the concentration gradient of the ion itself.
Preferred term	Passive Ion Transport
Entry term(s)	Ion Transport, Passive

Symport - Narrower

Concept UI	M0026033
Preferred term	Symport
Entry term(s)	Cotransport, Ion Ion Cotransport

Facilitated Ion Transport - Narrower

Concept UI	M0384360
Scope note	Transport of ions down a concentration gradient at greater rates than would occur through passive diffusion through a pore.
Preferred term	Facilitated Ion Transport
Entry term(s)	Ion Transport, Facilitated

Antiport - Narrower

Concept UI	M0026030
Preferred term	Antiport