Respiration Flashcards
What is respiration?
An exothermic reaction that is continuously occuring inside living cells
Name three uses of the energy released in respiration
To provide energy for
1. Muscle contraction for movement
2. For keeping warm
3. For the chemical reactions to build larger molecules
What is aerobic respiration?
Respiration that occurs when there is a sufficient supply of oxygen so glucose is completely oxidised
Where does aerobic respiration take place?
In the mitochondria
What is the word equation for respiration?
Glucose+ Oxygen→ Carbon dioxide + Water
What is the symbol equation for respiration?
C6H12O6 + O2 → CO2 + H2O
Does aerobic respiration release a lot or a little energy?
A lot of energy
Why does aerobic respiration release a lot of energy?
There is a sufficient supply of oxygen
So glucose is completely oxidised
Where does anaerobic respiration take place?
In muscle cells
In plants
In yeast
Why does anaerobic respiration take place?
Whne there is an insufficient supply of oxygen
So glucose is incompletely oxidised
What is the word equation for anaerobic respiration in muscle cells?
Glucose → Lactic acid
Does anaerobic respiration release a lot or a little energy?
A little energy
Why does anaerobic respiration only release a little energy?
The oxidation of glucose is incomplete as there is an insufficient supply of oxygen
What is the word equation for anaerobic respiration in plants and yeast?
Glucose → Ethanol + Carbon Dioxide
What is anaerobic respiration in yeast called?
Fermentation
What is fermentation used for in industry?
- Making alcohols
- Making bread
How does the fermentation of yeast produce alcohols?
The ethanol produced in the anaerobic respiration (fermentation) is used to make beer or wine
How does the fermentation of yeast help to produce bread?
The carbon dioxide produced in the anaerobic respiratoin (fermentation) makes bubbles which causes the bread to rise
In respiration, glucose is oxidised and energy is [blank]
fill in the blank
In respiration, glucose is oxidised and energy is RELEASED
Energy is NOT PRODUCED, it is RELEASED
Compare aerobic respiration with anaerobic respiration
In aerobic respiration, glucose is completely oxidised as there is a sufficient supply of oxygen, this a lot of energy is released- in anaerobic respiration, glucose is incompletely oxidised as there is an insufficient supply of oxygen and so less energy is released than aerobic respiration
In aerobic respiration th products are carbon dioxde and water, in anaerobic respiration in muscle cells, lactic acid is produced
- need for oxygen, 2. differing products 3. amount of energy used
