Summary
Summary Excretion, Transport of Carbon Dioxide and Nitrogenous Waste.
Revision notes on excretion, transport of carbon dioxide and nitrogenous waste.
[Show more]
Seller
Follow
Content preview
Excretion, CO2 & Nitrogenous Waste. Excretion is the removal of waste products of metabolism from
the body.
E.g. Removal of urea, water & CO2.
Metabolism is the chemical reactions that occur inside cells.
Metabolic waste is the substances that are toxic or produced in
excess from reactions inside cells.
Egestion is the removal of undigested food that has never been
involved in metabolism.
Deamination is the removal of the amine group from an amino
acid, producing ammonia.
Transporting CO2:
5% of CO2 dissolves into plasma.
10% of CO2:
1. CO2 diffuses into erythrocytes from respiring cells.
2. CO2 combines with haemoglobin to from
carbaminohaemoglobin.
85% of CO2:
1. CO2 diffuses into erythrocytes from respiring cells.
2. CO2 combines with water in the cell to produce H2CO3,
this is catalysed by carbonic anhydrase:
CO2 + H2O H2CO3
3. H2CO3 dissociates in water into protons & hydrogen
carbonate ions:
H2CO3 + H2O H+ + HCO3-
4. Hydrogen carbonate ions diffuse out of the erythrocyte
and into the plasma where it dissolves.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller flcarr23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
64438 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now