IMED1001 Study Guide - Final Guide: Osmotic Concentration, Osmosis, Aquaporin
Document Summary
(the movement of water across a membrane) Allow bidirectional diffusion (osmosis) of h2o. (the rest is sucrose, nacl, kcl, + yellow) (the inverse of [h2o], ie - the concentration of everything other than water) So, water will diffuse from low high osmolarity. Water diffuses from high to low water concentration. 1 osmole is one mole of osmotically active stuff. = 1 mole glucose i. e. = 1 osmole. = 1 mole na+ + 1 mole cl- i. e. = 2 osmoles. = 1 mole mg2+ + 2 moles cl- i. e. = 3 osmoles. Depends on how much it dissociates at cellular ph. Osmolarity of proteins and macromolecules hard to predict depends on disassociation. 1 osmole/l = 1 osmolar = 1 osm = 1 osmol/l. Cytoplasm of typical cells has osmolarity of. Would expose it to almost 8 x atmospheric pressure. Whether a cell swells or shrinks due to osmosis.
