Physiology 1021 Lecture Notes - Lecture 1: Ion Channel, Facilitated Diffusion, Membrane Transport

• School: Western University
• Department: Physiology
• Course: Physiology 1021
• Professor: John Ciriello

Document Summary

Membrane transport (passive-active) simple diffusion of fat soluble molescules, diffusion through protein channel, facilitated diffusion and active transport. Osmosis: the net movement of water down its concentratin gradient. There is a protein channel that allows waater to come in as it comes. Water moves from where there is a lot of free molescules in water . Asmosis is important in nature to allow the soil to receive water. You always have to apply more pressure in b because there is a bigger difference in concentrated. Osmolarity is thr number of particles per litre of solution (osnol/l) Osmosis is proportional to the number of particles. Osmolarity = molarity x number of particles per molecule. The number of coles of the substance in solution. Movement of ions across a membrane : molecules move from high to low concentration araeas. This means that they move down there chemical gradient.