Respiration Flashcards
What is respiration
A chemical reaction that releases energy into every living cell of every organismic
What is respiration used for (4)
Contraction (of muscle cells to produce movement)
Active transport (molecules and ions)
Building large molecules (proteins)
Cell division
What does respiration also release besides energy
Heat, used to maintain steady body temperature
Why are the two types of respiration
Aerobic respiration (wth oxygen) Anaerobic respiration (without oxygen)
What is the word equation for aerobic respiration
Glucose + Oxygen —> Carbon dioxide + Water ( + energy ⚡️)
What is the balanced equation of aerobic respiration
C6H12O6 + 6️⃣O2 —> 6️⃣CO2 + 6️⃣H2O + (+ energy⚡️)
Where does aerobic respiration occur
In the mitochondria of a cell
Examples of cells that anaerobic respiration occur (2)
Yeast
Muscle
Anaerobic respiration in yeast cells:
Another name for the reaction
What are yeast cells
Uses
Word equation
Fermentation
Yeast cells are single celled fungi
Used for commercial purposes such as brewing
Glucose —> Ethanol + Carbon dioxide (+ some energy ⚡️)
Anaerobic respiration in muscle cells:
When does it happen
Word equation
Occurs when the blood is unable to reach the muscles fast enough to supply them with the required oxygen
Glucose —> Lactic acid (+ some energy ⚡️)
What is oxygen debt
The volume of oxygen needed to completely oxidise the lactic acid that builds up in the body during anaerobic respiration
What does lactic acid cause
Cramps
What just be used to break down lactic acid
Oxygen
Where does anaerobic respiration occur
Cytoplasm
Which respiration releases the most energy
Aerobic
What are the products of aerobic respiration
Carbon dioxide and water
What are the products of anaerobic respiration
Lactic acid or ethanol
Experiment to show living organisms produce CO2
Suspend maggots/ woodlice on a gauze in a test tube
Limewater turns cloudy then CO2 is present
Bung over the test tube
Experiment: why do the germinating seeds produce heat and why do the boiled not
The germinating seeds are respiring and therefore releasing heat l. The boiled seeds have been killed and are therefore not resourcing anymore
Experiment: why do the germinating seeds produce heat and why do the boiled not
The germinating seeds are respiring and therefore releasing heat l. The boiled seeds have been killed and are therefore not resourcing anymore
