DASC20010 Lecture Notes - Lecture 21: Capillary Refill, Osmotic Concentration, Posterior Pituitary

• School: University of Melbourne
• Department: Animal Science
• Course: DASC20010
• Professor: Peter Cakebread

Document Summary

Water = 60% body weight (total fluid) More likely weight changes are caused by water (short-term changes: of the fluid intracell is 40, extracell= 20, 5% plasma, more extracell in newborn. Protei(cid:374) a(cid:374)io(cid:374)s (cid:272)a(cid:374)"t (cid:373)o(cid:448)e out of the (cid:272)ell so keep it (cid:271)ala(cid:374)(cid:272)ed i(cid:374)side. Fluid more likely to go in cell or plasma than extracell cos slightly higher osmol. Changes to plasma caused by low blood pressure can cause icf difference. Increase in blood pressure = increase in icf. Most of the k just allows them to retain the na so they can keep osmol. If 8-(cid:1005)(cid:1004)%: su(cid:374)ke(cid:374) e(cid:455)es (cid:894)fluid is(cid:374)"t there to push the(cid:373) for(cid:449)ard(cid:895), depressio(cid:374) (cid:894)la(cid:272)k of fluid to brain), very low capillary refill (longer than 3 seconds: at greater tha(cid:374) (cid:1005)(cid:1004)%: (cid:272)old e(cid:454)tre(cid:373)ities, re(cid:272)u(cid:373)(cid:271)e(cid:374)t (cid:894)(cid:272)a(cid:374)"t sta(cid:374)d(cid:895) Hypo- stress, increase h2o intake, kidney failure (can lead to hypertonic cos heaps of water will go through kidney and take all salts)