Energy from Respiration: Aerobic Respiration Flashcards
What catalyzes respiration?
enzymes
Where does aerobic respiration?
mitochondria
Equation for aerobic respiration
glucose + oxygen –> carbon dioxide + water + energy
Chemical equation for aerobic respiration
C6H12O6 + 6O2 –> 6CO2 + 6H2O
How is respiration used?
- build larger molecules from smaller ones
- enable muscle contraction (in animals)
- maintain constant body temperature (in mammals and birds)
- build sugars, nitrates and other nutrients into amino acids ad then proteins (in plants)
Experiment about respiration`
- limewater: detects carbon dioxide - turns cloudy
- quicker limewater turns cloudy, faster cabon dioxide being produced
- rise in temperature also indication of respiration occurring
Howis energy provided for muscle contraction?
carbohydrase glycogen converted into glucose
When muscular activity increases, what is needed?
- more glucose and oxygen
- higher rate of removal of carbon dioxide
What increases during exercise?
- heart rate
- breathing rate
What is the effect of an increased heart rate?
- arteries dilate
- increased blood flow to muscles
- therefore increases supply of glucose and oxygen
- increases rate of removal of carbon dioxide
What is the effect of an increased breathing rate?
- breathing deeper and more frequent
- more air inhaled
- therefore more oxygen picked up by cells
- more carbon dioxide exhaled from blood
What are muscle tissues made out of?
protein fibres containing lots of mitochondria
What are the benefits of exercise?
- regular exercise increases volume of heart and lungs
- develops bigger and more effective blood supplu
What is the maxium rate you should push your heart?
220 bpm minus your age
How to measure fitness levels
- measure resting heart rate and breathing rate ( the lower the fitter)
- measure the it takes for an increased heart/breathing rate to return to normal
