Contents. List of Contributors. Introduction to Volume 6 (S.L. Bonting). Changes in the Immune System during and after Spaceflight (G.R. Taylor, I. Konstantinova, G. Sonnenfeld, and R. Jennings). Activation and Proliferation of Lymphocytes and other Mammalian Cells in Microgravity (A. Cogoli and M. Cogoli-Greuter). Psycosocial Value of Space Simulation for Extended Spaceflight (N. Kanas). Pharmacology in Space: Pharmacotherapy (A.P. Traon, S. Saivin, C. Soulez-LaRiviere, M. Pujos, A. Guell, and G. Houin). Pharmacology in Space: Pharmacokinetics (S. Saivin, A.P. Traon, C. Soulez-LaRiviere, A. Guell, and G. Houin). Regulation of Body Fluid Volume and Electrolyte Concentrations in Spaceflight (S.M. Smith, J.M. Kraufs, and C.S. Leach). Medical Monitoring in Long-Term Space Missions (A.I. Grigoriev and A.D. Egorov). Frog Experiment Onboard Space Station MIR (A. Izumi-Kurotani, Y. Mogami, M. Okuno, and M. Yamshita). Plant Gravitropic Response (A. Merkys and J. Darginaviciene). Human Life Support for Advanced Space Exploration (S.H. Schwartzkopf). Bioregeneration with Maltose Excreting Chlorella: System Concept, Technological Development, and Experiments (L. Wolf). Vestibular Function and Sensory Interaction in Altered Gravity (L.N. Kornilova). Index.