Cellular respiration Flashcards
What is potential energy?
Energy stored in food (glucose)
Plants and animals need energy that is stored in food for…
Growth and movement. Basically all 7 of the life processes.
Define ‘Cellular respiration.’
To release the energy stored in food, it must be broken down into simpler substances. The process where sugars are converted into useable energy.
Give a word equation for cellular respiration.
Glucose + oxygen ——> energy (ATP) + carbon dioxide + water
Where does cellular respiration take place?
In the mitochondria, in plant and animal cells.
The mitochondria is an organelle.
What is an organelle?
A mini organ in cells.
Name the requirements of cellular respiration.
Glucose
–> contains potential energy
–> plants make it through photosynthesis
–> animals get glucose from food
Oxygen
–> plants get oxygen through pores in their leaves (stomata)
–> animals get oxygen through lungs/skin/gills
Name the products of cellular respiration.
Carbon dioxide
–> by-product. Plants release CO2 from stomata, animals release CO2 from lungs/skin/gills.
Water
–> by-product: plants release H2O through stomata in form of water vapour, animals release H2O through lungs/skin/gills/sweat/kidneys in the form of sweat.
Energy
–> ATP. Main product! Glucose is broken down into energy-rich molecules that are used in the life processes in plants and animals.
Describe the link between the word equations of cellular respiration vs photosynthesis.
The products of photosynthesis are the reactants of cellular respiration (and vice versa).
What are the reactants in the cellular respiration?
Reactants are the substances that are present in the beginning of the equation. In this case, they are glucose and oxygen.
Identify the main product of cellular respiration.
Energy (ATP).
What does the arrow in a word equation indicate?
A reaction takes place.
Explain why the process of cellular respiration is important for life.
It converts stored energy in food into useable energy.
What happens during cellular respiration?
Glucose and oxygen react to form CO2 and H2O and ATP is released (potential energy that was stored in glucose).
What is the organic compound that is a reactant in the process of cellular respiration ?
Sugar
