BLG 10A/B Lecture Notes - Lecture 7: Inferior Vena Cava, Ureter, Countercurrent Exchange
Document Summary
Collecting ducts collect fluid from the nephrons & brings it to renal pelvis. Structures: glomerular capsule proximal convoluted tubule loop of henle distal convoluted tubule collecting duct. & secretes) & aldosterone: whether to keep water or not, ph regulation, throughout the nephron. [ ] increases on the way down (reabsorption of water), decreases on the way up (reabsoption of na & cl) loop of henle determines concentration (longer in juxtamedullary nephrons) Contact point b/w afferent arteriole & distal tubule: afferent arteriole juxtaglomerular (jg) cells (granular cells) Baroreceptors (response to pressure) secrete renin in response to a decrease in bp (when you are dehydrated) Renin increases filtration when bp is low: distal tubule macula densa. Monitor filtrate osmolality in distal tubule (chemoreceptors) Stimulate jg cells to release renin when filtrate osmolality decreases. Cause dilation of afferent arteriole increases blood flow to glomerulus, bp and gfr increase. Glomerular hpgc = hydrostatic pressure of glomerular capillaries.
