The Bioenergetics shit that we were actually taught

Question 1

What is aerobic respiration?

Answer 1

Respiration using oxygen. It is the most efficient way to transfer energy from glucose and it goes on all the time in plants and animals

Question 2

Where do most of the reactions in aerobic respiration happen?

Answer 2

Inside the mitochondria

Question 3

What is the word equation for aerobic respiration?

Answer 3

glucose + oxygen 🡲 carbon dioxide + water

Question 4

What is the symbol equation for aerobic respiration?

Answer 4

C6H1206 + 602 🡲 6CO2 + 6H20

Question 5

What is an easy way the remember the equation for aerobic respiration?

Answer 5

It is the equation for photosynthesis backwards

Question 6

When is anaerobic respiration used?

Answer 6

When you do vigorous exercise and your body cant supple you muscle’s with enough oxygen

Question 7

What is anaerobic respiration?

Answer 7

Without oxygen, it is the incomplete breakdown of glucose, making lactic acid

Question 8

What is the con of using anaerobic respiration?

Answer 8

Anaerobic respiration doesn’t transfer nearly as much energy as aerobic respiration because the glucose isn’t fully oxidised (cause it doesn’t combine with oxygen)

Question 9

When is anaerobic respiration useful?

Answer 9

During emergencies during exercise when it allows you keep on using your muscles for a while longer.

Question 10

How do plants and yeast cells respire?

Answer 10

They use respire without oxygen but they produce ethanol (alcohol) and carbon dioxide instead of lactic acid

Question 11

What is the word equation for anaerobic respiration in plant and yeast cells?

Answer 11

glucose 🡲 ethanol + carbon dioxide

Question 12

What is anaerobic respiration in yeast cells called?

Answer 12

Fermentation

Question 13

Why is Fermentation useful in the food industry

Answer 13

It can be used to make bread or alcoholic drinks e.g. beer and wine
In bread-making its the carbon dioxide from fermentation that makes the bread rise
In beer and wine-making, its the fermentation process that produces alcohol.

Question 14

Why do your muscles need energy?

Answer 14

To contract. When you exercise, some of your muscles contract more frequently than normal so you need more energy which comes from increased respiration.

Question 15

What does the increased respiration in your cells mean?

Answer 15

You get more oxygen into them

Question 16

Why isn’t anaerobic respiration the best way to transfer energy from glucose.

Answer 16

Because lactic acid builds up in the muscle which gets painful.

Question 17

What are effects of long periods of exercise?

Answer 17

Muscle fatigue- muscles can get tired and then drop contracting efficiently

Question 18

What happens when you stop exercising after using anaerobic respiration?

Answer 18

You will have an oxygen debt

Question 19

What is an oxygen debt?

Answer 19

An oxygen debt is the amount of oxygen your body needs to react with the build up of lactic acid and remove it from the cells. You have to repay the oxygen you didn’t get into your muscles in time because your lungs, heart and blood couldn’t keep up with the demand earlier on.

Question 20

How does the body cope with high levels of lactic acid?

Answer 20

It has to keep breathing hard for a while after you stop exercising get more oxygen into your blood which is transported to the other muscle cells. This means your pulse and breathing rate stay high whilst there are high levels of lactic acid and CO2
Another way is the that the blood that enters your muscles transports the lactic acid to the liver which converts the lactic acid back to glucose

Question 21

How can you investigate the effect of Exercise on the body?

Answer 21

By measuring breathing rate by counting breaths, and heart rate by taking the pulse. E.G take your pulse after sitting sown for 5 minuets, then after 5 minutes of slow jogging and then again after running for 5 minuets and plot your results on a bar chart.
Your pulse rate will increase the more intense the exercise is as your body needs to get more oxygen to the muscles and more carbon dioxide away from them muscles.
To reduce the affect of any random errors on your results, do it as a group and plot the average for each exersize.