Active transport  [motion picture] / 
Open University ; Vic Dainels, A. A. Eddy 
 - Milton Keynes :  Open University,  1975 
 - 1 film reel (24 min.) :  sd., b&w. ;  16 mm. +  notes 
<br/><br/> According to the so-called ion gradient hypothesis the spontaneous movements of sodium ions and possibly potassium ions across the cell membrane of mammalian cells provides the energy needed to concentrate amino acids within the cell.  This'sodium gradient' hypothesis is explained by a leading exponent, Prof, Eddy  Bahan rosak (Lupus) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cells