1 --;Transport Across Multimembrane Systems --;A. Introduction --;B. Organization of Epithelia --;C. Sodium Entry Coupled with Transport of Organic Substances --;D. Exchange Diffusion and Counter-Transport Systems in Epithelial Transport --;E. Transport of Water --;F. Hormonal Effects on Epithelial Transport --;References --;2 --;Role of Tight Junctions in Epithelial Function --;A. Introduction --;B. Ultrastructure --;C. Epithelial Diversity and the Paracellular Pathway --;D. Molecular Organization --;E. Modification of Tight Junction Permeability --;F. Role of Junctional Permeability in Epithelial Transport --;References --;3 --;Morphological Correlates of Transport --;A. Introduction --;B. The Organization of Cytoplasm --;C. Pericellular Pathways --;D. The Cell Surface --;E. Conclusions --;Acknowledgements --;References --;4 --;Transport in Giant Plant Cells II --;Freshwater Cells --;A. Introduction --;B. Active Transport Processes --;C. Intercellular Transport --;D. Control of Ionic Composition --;E. Excitability of Characean Cells --;References --;5 --;Ion Transport and Turgor Pressure Regulation in Giant Algal Cells --;A. Introduction --;B. Basic Elements of Turgor Regulation --;C. Experimental Methods of Measuring and Controlling Turgor Pressure --;D. Experimental Data on Osmotic Regulation --;E. Cellular Transport Properties Affected by Turgor Pressure --;F. Location and Nature of the Turgor-Pressure Transducer --;G. Relations between Turgor Regulation and other Controlled Processes --;H. Alternative Strategies for Controlling Turgor or Volume --;J. Conclusions and Aims for Future Work --;Acknowledgements --;Note Added in Proof --;References --;6 --;Transport Across Amphibian Skin --;A. Introduction: The Amphibian Skin as Experimental Object --;B. Anatomical Problems --;C. The Outer Barrier --;D. The Transport Compartment --;E. The Internal Barrier --;F. The Potential Profile --;G. Chloride and Other Anions --;H. Hydrogen Ion Secretion --;J. Aldosterone and Molting --;K. Conclusions --;References --;7 --;Transport Across Amphibian Urinary Bladder --;A. Introduction --;B. Structure as Related to Function --;C. Electrical Properties --;D. Membrane Selectivity --;E. Active Sodium Transport --;F. Movement of Water and Other Nonelectrolytes: Effects of Vasopressing --;G. Effects of Other Hormones --;References --;8 --;Transport Across Insect Excretory Epithelia --;A. Introduction --;B. Malpighian Tubules --;C. Transport Processes in the Hindgut --;D. Transport Processes Important to Excretion in Other Epithelia --;E. Concluding Remarks --;References --;9 --;Transport Across Insect Gut Epithelium --;A. Introduction --;B. Transport of Uncharged Molecules by the Insect Intestine --;C. K-Pump of Cecropia --;D. Lag Time --;E. Uniformity of Gut --;References --;10 --;Transport in Eye Epithelia: The Cornea and Crystalline Lens --;A. Introduction and Morphology --;B. The Cornea --;C. The Crystalline Lens --;Acknowledgements --;References --;11 --;Transport in Eye Epithelia: Ciliary Epithelium and Retina Pigment Epithelium --;A. Introduction --;B. Ciliary Epithelium and Outflow Channels --;C. Retina Pigment Epithelium --;Acknowledgements --;References --;12 --;Ion Transport Across the Choroid Plexus --;A. Introduction --;B. The Experimental Approach --;C. Ion Fluxes Across the Epithelium --;D. Na-K-ATPase and Secretion --;E. The Intracellular Na and K Concentrations --;F. Potassium Transport Across the Apical Membrane --;G. Na and CI Fluxes Across the Apical Membrane --;H. Passive Permeation --;J.A Model for Ion Transport --;Acknowledgements --;References --;13 --;The Sweat Glands --;A. Introduction --;B. The Morphology of the Sweat Glands --;C. The Vascularization of the Sweat Glands --;D. Innervation of the Sweat Glands --;E. Number of Sweat Glands --;F. Maximum Rate of Secretion --;G. Rate of Secretion from Individual Glands --;H. Ionic Composition of Sweat in Relation to Secretory Rate --;J. Mechnism of Secretion --;K. The Metabolism of the Sweat Glands --;L. Species Differences in Eccrine Sweat Gland Function --;References --;14 --;The Lacrimal Gland --;A. Introduction --;B. Tears --;C. Structure of the Lacrimal Gland --;D. Innervation of the Lacrimal Gland --;E. Ionic Composition of Lacrimal Gland Secretion in Relation to Secretory Rate --;F. Potassium Transient --;G. Mechanism of Secretion by the Lacrimal Gland --;References.