sdf
- Created by: nancy plant
- Created on: 13-01-14 09:49
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- Kidney
- Nephrons
- blood travels in through afferent arteriole
- Ultrafiltration occurs in the glomerulas, liquid and small molecules go into the bowmans capsule.
- large molecules like proteins and blood cells stay in the blood
- liquid and small molecules pas along the nephron and useful substances are reabsorbed along the way.
- Selective Reabsorption
- occurs along proximal convoluted tubule
- loop of henle
- distal convoluted tubule
- Loop of Henle
- COUNTER CURRENT MULTIPLIER MECHANISM
- sodium and chlorine ions diffuse into descending limb
- water moves out by osmosis
- sodium and chlorine ions move out of the ascending limb, by diffusion at the bottom and active transport at the top
- Water moves out of the collecting duct by osmosis
- Osmoregulation
- HYPOTHALAMUS
- when water contents of the blood is low posterior pituitary gland releases ADH
- ADH binds to receptors on the DCT
- Aquaporins are inserted into the plasma membrane, making the DCT more permeable to water
- Nephrons
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