Excretion

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Define Excretion
A process of expelling waste matter
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What are the 2 main products that are excreted?
Carbon Dioxide and Nitrogenous compounds
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What 2 things happen when you have a high concentration of CO2 in your blood?
1) Haemoglobin has a higher affinity for CO2 than for O2 so less O2 is transferred around the body, 2) Respiratory Acidosis- When the blood becomes too acidic
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What is Respiratory Acidosis?
The blood transports CO2 by binding it to hydrogen ions, the increase in CO2 means more hydrogen ions in the blood which increases the acidity of the blood, it affects the activity of enzymes and you feel weak, nauseous, lightheaded
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Describe Deamination
When the body consumes too many proteins, the body can't store amino acids so they are sent to the liver where they are oxidised and this creates ammonia
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What is Keto Acid?
A by-product produced from deamination
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What happens to Keto Acid after deamination?
It enters the mitochondria where it is respired
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Describe the Ornithine Cycle
This is the process in which ammonia is taken away because it is toxic. In the liver it is reacted with CO2 and water to produce Urea
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Card 2

Front

What are the 2 main products that are excreted?

Back

Carbon Dioxide and Nitrogenous compounds

Card 3

Front

What 2 things happen when you have a high concentration of CO2 in your blood?

Back

Preview of the front of card 3

Card 4

Front

What is Respiratory Acidosis?

Back

Preview of the front of card 4

Card 5

Front

Describe Deamination

Back

Preview of the front of card 5
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