PSL201Y1 Lecture Notes - Lecture 32: Distal Convoluted Tubule, Proximal Tubule, Descending Limb Of Loop Of Henle
Document Summary
Water balance fluid intake balanced by fluid output normal bulimia refers to normal blood volume hyper bulimia is high blood volume due to positive water balance hypobulimia is low blood volume due to negative water balance. Ascending limb of loop of henle is impermeable to water and active transport of na+, cl-, k+ and descending limb is permeable to water but impermeable to ions such as k+,na+, cl- Results of counter-current multiplier system fluid in proximal tubule is isoosmotic 300 mosm. Vasa recta afferent arteriole in juxtamedullary neuron forms the vasa recta capillaries. Water reabsorption in renal tubules 70% of water reabsorbed in proximal tubule and it isn"t regulated 20% reabsorbed in distal tubule regulated by adh 10% reabsorbed in collecting ducts regulated by adh (anti-diuretic hormone) Primary stimulus for release of adh is increased osmolarity (osmoreceptors) other stimuli: increase blood pressure (baroreceptors) + increase blood volume (volume receptors)
