Summary
GCSE AQA Biology Higher - Respiration Summary
This is notes/a summary about the Respiration topic from the Biogenetics module. This is for GCSE Biology Higher tier for AQA.
[Show more]
Seller
Follow
Content preview
RespirationAerobic Respiration: Sodium or Potassium Hydroxide(crystals or
Glucose + Oxygen → Carbon Dioxide + solution) - absorbs CO2
Water Silica gel - absorbs water
(C6H12O6) + Energy Cobalt chloride paper - tests for water, blue →
- Plants respire 24hrs a day pink
- Respiration happens in mitochondria Soda lime - absorbs CO2
- Glucose fully broken down, non toxic Hydrogen Carbonate Indicators - tests for CO2
products, sustainable more sensitive than lime water
- Need energy for homeostasis Less Atmosphere More
Lime water - cloudy if CO2 is present Purple ← Red → Yellow
Anaerobic respiration in plants and microbes Anaerobic respiration
Glucose → Ethanol + Carbon dioxide Glucose → Lactic Acid + Energy
It is used when oxygen is not available, Lactic Acid → Carbon Dioxide + Water
waterlogged roots can't take oxygen so do
anaerobic respiration Anaerobic respiration - organisms use too much
Yeast - ferments glucose as energy source, oxygen than can breathe in so energy is released
covered without oxygen
by oil so can't take oxygen but produces CO2, - toxic products
helps bread rise - Unsustainable
Brewing - yeast releases CO2 to Ethanol is left to - glucose not fully broken down
make into alcoholic drinks - Produces half the energy aerobic respiration
does
- Mostly used in short term
- Useful when we need energy in a hurry
Exercise Energy
Metabolism - the chemical reactions happening in
Heart Rate & breathing increase so we take in an organism these take energy
more oxygen and pump it around the body quicker
If don’t respire enough
Oxygen debt - when oxygen is needed to break → less metabolism
down lactic acid → can die
After lactic acid is broken down in the liver Respiration is an exothermic reaction
Exercise: Organisms need energy for:
- Increases heart rate - Homeostasis - keeping warm
- Increases number of breaths - Contraction - movement
- Increases breath volume - Growth - make larger molecules into bigger
ones
Prolonged exercise __________________________________________
→ cause muscle fatigue Lactic acid produced - is harmful to the body
→ they stop contacting efficiently → after anaerobic respiration we still breathe
heavily
→ to take in extra oxygen to convert it to CO2
&
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 josephinemcguinness. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £3.19. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 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