Respiration Flashcards
Why does your heart rate increase during exercise?
To pump oxygenated blood to muscles tissues and cells
Why does breathing rate and breath volume increase?
Because of the amount of oxygen entering the blood system.
Why do living organisms need energy from respiration for movement?
To enable muscles to contract in animals.
Why do living organisms need energy from respiration for keeping warm?
To keep a steady body temperature in a cold environment.
Why do living organisms need energy from respiration for chemical reactions?
To build larger molecules from a smaller one.
What is respiration?
Respiration is an exothermic reaction. It occurs continuously to supply cells with ATP.
What’s the equation for anaerobic respiration in plant cells?
Glucose = ethanol + carbon dioxide
What is anaerobic respiration in yeast cells known as?
Fermentation
What is anaerobic respiration?
Respiration that takes place when oxygen is in short supply. Usually occurs during intensive exercise.
Why would anaerobic respiration be needed during exercise?
Because the muscles are respiring so fast that blood can’t transport enough oxygen to meet the needs of the body.
What happens to glucose during anaerobic respiration?
It is partially oxidised to create lactic acid.
What effect does lactic acid have on muscles and muscle tissue?
It causes muscles to become painful and fatigued once it builds up.
What is aerobic respiration?
Respiration with oxygen. Occurs in the mitochondria.
What happens to glucose during aerobic respiration?
It is oxidised to transfer the energy that the organism needs to perform its functions.
What is the equation for aerobic respiration?
glucose + oxygen = carbon dioxide + water
6O2 + C6H12O6 = 6CO2 + 6H2O
