PHGY 209 Lecture Notes - Lecture 5: Cell Membrane, Lymphatic Vessel, Starling Equation

• School: McGill University
• Department: Physiology
• Course: PHGY 209
• Professor: Melissa A Vollrath

Document Summary

Normal ph range 7. 3 ~ 7. 45: protective: against invading organisms through blood cells and proteins. Blood comprises both ecf (plasma) and icf (inside blood cells) * may be studied in vivo (intact individual) and in vitro (in glass) * accounts for ~7% of body mass = ~5 l (70 kg) Hematocrit: the percentage of blood volume that is occupied by red blood cells. Blood volume = ~7-8% of body weight // 5-5. 5 l (70 kg male) If hematocrit (% of blood volume occupied by rbcs) is 45% Total blood volume occupied by rbcs = ~2. 25 l. Total blood volume occupied by plasma = ~2. 75 l. Composition of plasma (similar to that of isf): > 90&% water, na+, k+, (ca++, mg++) *may be approximated by physiological saline: 0. 9g/dl nacl or 9g/l nacl: glucose, amino acids, lipids, urea, lactic acid, o2, co2. *rapid turnover: proteins (colloids) = 7g% = 7g/dl of plasma contains proteins.