ACTIVE TRANSPORT

IPA (US):

 Dictionary entry overview: What does active transport mean? 

• ACTIVE TRANSPORT (noun)
  The noun ACTIVE TRANSPORT has 1 sense:

1. transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy

  Familiarity information: ACTIVE TRANSPORT used as a noun is very rare.

 Dictionary entry details 

• ACTIVE TRANSPORT (noun)

Sense 1

Meaning:

Transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy

Classified under:

Nouns denoting natural processes

Hypernyms ("active transport" is a kind of...):

transport (an exchange of molecules (and their kinetic energy and momentum) across the boundary between adjacent layers of a fluid or across cell membranes)

Domain category:

drug (a substance that is used as a medicine or narcotic)

 Context examples 

This protein plays a role in active transport of calcium ions.

(Calcium-Transporting ATPase Type 2C Member 2, NCI Thesaurus)

Dihydrostreptomycin depends on active transport across the bacterial cell membrane before irreversibly binding S12 protein of the bacterial 30S ribosomal subunit.

(Dihydrostreptomycin, NCI Thesaurus)

Electro-osmosis describes the active transport of non-ionized solutes associated with the bulk flow of fluid in the direction of the counter-ions that occurs with iontophoretic transport of other, ionized solutes.

(Electro-osmosis Route of Administration, NCI Thesaurus)

This process could involve specialized and/or non-specialized mechanisms, active transport or passive movement, and carrier system(s).

(Biological Absorption, NCI Thesaurus)

This gene plays a role in active transport.

(ATP2C2 Gene, NCI Thesaurus)

They couple ATP hydrolysis to active transport of a wide variety of substrates such as ions, sugars, lipids, sterols, peptides, proteins, and drugs.

(ABC Transporter Pathway, NCI Thesaurus/KEGG)

Inhibition of this enzyme in the kidney results in a reduction in the availability of hydrogen ions for active transport in the renal tubule lumen, thereby leading to increased bicarbonate and cation excretion, and increased urinary volume.

(Acetazolamide Sodium, NCI Thesaurus)

The energy derived from hydrolysis of ATP is used to drive metabolic reactions including nucleic acid and protein synthesis, to move molecules against concentration gradients (active transport), and to produce mechanical motion (contraction of microfibrils and microtubules).

(ATP Hydrolysis, NCI Thesaurus)