PHGY 209 Lecture Notes - Lecture 17: Pinocytosis, Horse Length, Endothelium

• School: McGill University
• Department: Physiology
• Course: PHGY 209
• Professor: Ann Wechsler

Document Summary

Osmolarity: osmolarity is the total solute concentration defined as the number of osmoles (osmol) of solute per liter of solution (osm) 1 osmol = 1 mol of solute particles. 1 mol glucose = 1 osmol of solute. 1 mol nacl = 1 mol na + 1 mol cl = 2 osmol of solute. 1 mol glucose/l = 1 osmol/l = 1 osm. 1 mol nacl/l = 2 osmol/l = 2 osm: osmotic pressure is proportional to osm. Osmotic pressure of physiological saline: determine molarity. 0. 9% saline = 9g nacl/l h2o (l ~ 1000g) Moles = 9g nacl/58. 5gmol-1 nacl = 0. 15 moles nacl. Molarity = moles/l = 0. 15 moles nacl/l = 0. 15 m nacl solution: determine osmolarity. 0. 15m nacl solution = 0. 15 mole na + 0. 15 moles cl = 0. 15 osmol + 0. 15 osmol = 0. 30 osmol = 300 mosm: calculate osmotic pressure. Osmotic pressure = 0. 30 osm x 22. 4 atm/osm = 6. 7 atm.