Waste Disposal-B5
- Created by: Shannon
- Created on: 31-05-13 09:30
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- Waste Disposal
- Drinking a lot of water increases the production of urine, but decreases the conc.
- Exercise-production decreases, conc. increases
- Pituitary gland-anti diuretic hormone (ADH) controls urea production
- Increase permeability of kidney tubules-absorption of water
- Negative feedback loop
- Nephrons-filtration of urine
- Glomerulus surrounded by a capsule-filtration unit
- Dialysis-removes urea from the blood, diffuse through the membrane under increased pressure
- Maintains blood sodium levels
- CO2 is detected by carotid artery: nerve impulses increase breathing rate to remove CO2
- Excess amino acids are broken down in the liver- form urea
- Enters kidney by renal artery (blood containing waste)- leaves ureters as urine
- Kidney has outer cortex and medulla
- Enters kidney by renal artery (blood containing waste)- leaves ureters as urine
- Useful materials are reabsorbed-water, salt, glucose
- Drinking a lot of water increases the production of urine, but decreases the conc.
- Useful materials are reabsorbed-water, salt, glucose
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