Contents 



Preface v 



1 Scope of the problem 3 



General 3 



Secretion 5 



Transport into cells 8 



2 Concepts and terms 12 



Diffusion 1 2 



Mediation of transport 1 5 

 Relationship between secretion and concentrative uptake 



by cells 36 



Finocytosis and membrane floiv 40 



Group translocation 41 



Definition of transport 43 



3 Kinetic approach to transport 45 



Diffusion 45 



Chemical mediation 45 



Systems with concentrative capabilities 49 



Migration by more than one process 50 



Inhibition 5 1 



4 Specificity of transport 53 



General 53 



Specificity of glycerol transport 54 



vii 



