respiration Flashcards
(23 cards)
What is respiration?
A chemical reaction carried out in all living organisms.
What are the two types of respiration?
- Aerobic respiration
- Anaerobic respiration
What is the primary waste product of respiration?
Carbon dioxide and water.
What is ATP in the context of respiration?
A molecule that transfers energy released from glucose during cellular respiration.
What are processes that require energy from ATP?
- Chemical reactions to build larger molecules
- Muscle contraction for movement
- Keeping warm for enzyme activity
What does aerobic respiration require?
Oxygen.
What is the main product of aerobic respiration?
A relatively large amount of energy.
What is the word equation for aerobic respiration?
Glucose + Oxygen → Carbon Dioxide + Water.
What is the symbol equation for aerobic respiration?
C6H12O6 + 6O2 → 6CO2 + 6H2O.
What does anaerobic respiration not require?
Oxygen.
What is a key characteristic of anaerobic respiration in animals?
It produces lactic acid.
What happens to lactic acid in muscle cells?
It builds up and lowers the pH, which can denature enzymes.
What is anaerobic respiration in plants and yeast called?
Fermentation.
What are the products of anaerobic respiration in yeast?
- Ethanol
- Carbon dioxide
What is the significance of fermentation?
It is economically important in the manufacture of bread and brewing.
How can we investigate respiration practically?
By measuring carbon dioxide production and heat from germinating seeds or other organisms.
What apparatus is used to demonstrate carbon dioxide production in respiration?
- Boiling tubes
- Rubber bungs
- Hydrogen carbonate indicator solution
What color does the hydrogen carbonate indicator turn in high CO2 levels?
Yellow.
What is the expected result for tube A in the carbon dioxide production experiment?
It should turn yellow as the seeds are respiring.
What is the expected result for tube B in the carbon dioxide production experiment?
It should remain red as the dead seeds produce no carbon dioxide.
What is the purpose of using vacuum flasks in the heat production experiment?
To measure temperature changes resulting from respiration.
What does an increase in temperature in the flask with germinating seeds indicate?
Respiration is an exothermic reaction.
What does CORMS stand for in the context of practical investigations?
- Change
- Organisms
- Repeat
- Measurement
- Same
