B2.4

HideShow resource information
Where does aerobic respiration take place and what is chemical equation?
In the mitochondria. Glucose + oxygen --> CO2 + water + energy
1 of 11
What can the energy released from respiration be used for?
Build larger molecules from smaller ones (i.e. amino acids --> proteins), thermoregulation, muscle contraction in animals
2 of 11
How can you conduct an investigation to measure the volume of CO2 produced in aerobic respiration?
Limewater used to test for CO2 – turns cloudy
3 of 11
Why does your heart rate increase and blood vessels dilate during exercise?
To allow more blood containing O2 + glucose to reach the muscles.
4 of 11
Why does your breathing rate and depth of each breath increase during exercise?
To allow a greater uptake of oxygen + release of carbon dioxide at the lungs.
5 of 11
How do muscles store glucose?
As glycogen-converted back to glucose for use during exercise.
6 of 11
What does your body need for exercise?
Muscles need more energy to contract – Need to increase the rate at which O2 + glucose reach muscle cells for aerobic respiration + need to remove the extra waste CO2 produced more quickly
7 of 11
What happens if you use your muscles over a long period of time?
Fatigued due to build-up of lactic acid + less energy is released from anaerobic respiration.
8 of 11
What happens when your muscles cannot get enough oxygen to respire aerobically?
Respire anaerobically, producing lactic acid (as glucose is not completely broken down). Lactic acid removed by blood flowing through muscles.
9 of 11
Why is anaerobic respiration inefficient?
As breakdown of glucose is not complete + lactic acid is produced as waste product instead of CO2 + water.
10 of 11
Why do runners in a marathon pant so heavily even after they have stopped running?
As you need a lot of oxygen to completely break down lactic acid after exercise - the “oxygen debt” must be repaid. O2 oxidises lactic acid into CO2 + H2O.
11 of 11

Other cards in this set

Card 2

Front

What can the energy released from respiration be used for?

Back

Build larger molecules from smaller ones (i.e. amino acids --> proteins), thermoregulation, muscle contraction in animals

Card 3

Front

How can you conduct an investigation to measure the volume of CO2 produced in aerobic respiration?

Back

Preview of the front of card 3

Card 4

Front

Why does your heart rate increase and blood vessels dilate during exercise?

Back

Preview of the front of card 4

Card 5

Front

Why does your breathing rate and depth of each breath increase during exercise?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Respiration and exercise resources »