Accession Number : AD0617700

Title :   ACTIVE TRANSPORT OF IONS.

Descriptive Note : Final rept.,

Corporate Author : UNIVERSITY COLL DUBLIN (IRELAND) UNIT OF CELL METABOLISM

Personal Author(s) : Conway,Edward J.

Report Date : 27 JAN 1965

Pagination or Media Count : 55

Abstract : The interpretation given to active transport of ions is their movement from a lower to a higher chemical or electrochemical potential, work being done in the process. This process can be represented as occuring in stages: (a) Firstly the ion attaches itself to a carrier. This attachment involves electrical adsorption to an ion or ions of opposite charge. Also, in order to enter into or cross membrane barriers the complex of ion and carrier may be assumed to be lipoid soluble. (b) The ions are released from their attachment to the complex by the release in some way of the electric charges attaching to the carrier ions. (c) This may be considered as accomplished by the activity of the redox pump or alternatively by some special action of an ATPase enzyme, the process occurring in a cyclical manner, and involving the input of free energy. (Author)

Descriptors :   (*ELECTROLYTES(PHYSIOLOGY), TRANSPORT PROPERTIES), (*MEMBRANES(BIOLOGY), TRANSPORT PROPERTIES), (*CELLS(BIOLOGY), TRANSPORT PROPERTIES), SODIUM, IONS, SECRETION, OXIDATION REDUCTION REACTIONS, OSMOSIS, HYDROGEN, EXCRETION, ADENOSINE PHOSPHATES, MUSCLES, YEASTS, NITROPHENOLS, ACETATES, ENZYMES, FEEDBACK, DYES, DIFFUSION, BODY FLUIDS, IRELAND

Distribution Statement : APPROVED FOR PUBLIC RELEASE