2(f) Respiration Flashcards
What is respiration?
It is a chemical reaction that occurs inside all living cells that releases energy from food (glucose).
Which small molecule is produced from respiration in living organisms?
ATP
ATP provides energy for all cells, state the processes that require energy in cells.
To build up Larger Molecules.
To maintain a steady body temperature in colder surroundings.
To enable muscles to contract.
Active transport of materials across boundaries.
What are the two types of respiration?
Aerobic and anaerobic.
What is aerobic respiration?
It is a reaction that takes place when there is plenty of oxygen.
Where does aerobic respiration take place in cells?
It takes place in the mitochondria.
What is the word equation for aerobic respiration in living organisms?
Glucose + Oxygen -> Carbon Dioxide + Water + Energy(ATP) (Some released as heat)
What is the balanced chemical symbol equation for aerobic respiration in living organisms?
C6 H12 O6 + 6O2 ~> 6CO2 + 6H2O
What kind of reaction is respiration? (Hint: waste product)
Exothermic
Explain the results of the seeds/peas experiment.
Respiration releases heat, but the dead peas can’t respire whereas the living peas can, causing a change in temperature.
Describe how limewater can be used to show that respiration has happened.
Limewater turns cloudy in the presence of carbon dioxide (due to respiration).
Describe how hydrogen carbonate indicator can be used to demonstrate that respiration has occurred.
The indicator is orange when Carbon Dioxide levels are at normal air levels. However, an increase in carbon dioxide (due to respiration) changes the indicator to yellow and a decrease in carbon dioxide changes it to purple.
Describe the differences between aerobic and anaerobic respiration.
Aerobic respiration needs oxygen, anaerobic does not.
Aerobic respiration completely breaks down the energy but anaerobic respiration results in an incomplete breakdown of the energy.
What is anaerobic respiration?
Anaerobic respiration is a reaction that occurs in the absence of oxygen.
What is the word equation for anaerobic respiration in animals (lactic acid)?
Glucose ~>Lactic acid + some energy (ATP)
