Excretion

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  • Created by: Ellie
  • Created on: 17-04-13 19:11
What do plants excrete?
O2 and CO2
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What are the human organs of excretion?
Lungs,kidneys and skin
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What do the Lungs excrete?
CO2 and H2O
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What does skin excrete?
H2O
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What do your kidneys excrete?
Urea, H2O, excess minerals
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What is the functional unit of a kidney?
Nephron
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What are the kidneys jobs?
Excretion and Osmoregulation
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Describe Ultrafilltration
Blood pressure forces out small molecules from the glomerulus into the bowman's capsule.
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What is and isn't forced from the glomerulus into the bowman's capsule?
Urea, water, salts ,glucose and not Protein
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Describe selective reabsorbtion
Substances are reabsorbed into the blood in the proximal convoluted tubule
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What substances are reabsorbed and how?
All glucose- active transport, some salt - diffusion and active transport, some water - osmosis
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What substances aren't reabsorbed and why?
Urea, excess salts and water because they make urine
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Where is water reabsorbed?
The collecting duct
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What is the tube connecting your bladder to your kidneys?
Ureter
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What is the tube coming from your bladder?
Urethra
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What happens when blood water levels are too low?
Hypothalamus detects. Pituitary gland releases ADH into the blood. The cells in the collecting duct of the nephrons respond to hormone. Collecting duct becomes more permeable. Water is taken from duct back into the blood
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Other cards in this set

Card 2

Front

What are the human organs of excretion?

Back

Lungs,kidneys and skin

Card 3

Front

What do the Lungs excrete?

Back

Preview of the front of card 3

Card 4

Front

What does skin excrete?

Back

Preview of the front of card 4

Card 5

Front

What do your kidneys excrete?

Back

Preview of the front of card 5
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