B9 - Respiration

Question 1

Where does a mammal get there energy from?

Answer 1

Food

Question 2

What is Respiration?

Answer 2

The process of transferring energy from glucose which goes on in every cell

Question 3

Is respiration an exorthermic reaction or an endothermic reaction?

Answer 3

Exothermic

Question 4

Why is respiration an exothermic reaction?

Answer 4

It transfers energy to the environment

Question 5

What are three examples organisms use energy thats transferred by respiration?

Answer 5

To build up larger molecules from smaller ones (protiens from animo acids)
To allow muscles to contract
To keep body temperature steady in cold conditions

Question 6

What is Metabolism?

Answer 6

The sum of all the chemical reactions happening in an organism

Question 7

What are some example reactions where larger molecules are made from smaller ones

Answer 7

Starch is made from lots of glucose molecules
Protein is made from animo acids which are made from glucose and nitrate ions

Question 8

What are the two types of respiration?

Answer 8

Aerobic respiration and Anaerobic Respiration

Question 9

What is Aerobic respiration?

Answer 9

Respiration using oxygen

Question 10

Where do most of the reactions in aerobic respiration take place?

Answer 10

In the mitochondria

Question 11

What is the symbol equation for AEROBIC RESPIRATION?

Answer 11

C6H12O6 + 6O2 ———–> 6CO2 + 6H2O

Question 12

What is the word equation for AEROBIC RESPIRATION

Answer 12

Glucose + oxygen ———> carbon dioxide + water

Question 13

What is anaerobic respiration?

Answer 13

Respiration without oxygen

Question 14

What is the word equation for ANAEROBIC respiration in muscle cells?

Answer 14

Glucose ———> lactic acid

Question 15

When does anaerobic respiration happen?

Answer 15

When you do intense exercise and your body cant supply enough oxygen to your muscles

Question 16

What makes lactic acid?

Answer 16

The incomplete breakdown of glucose that isnt fully oxidised

Question 17

What is the word equation for anaerboic respiration in Plants and Yeast cells?

Answer 17

Glucose ———> ethanol + carbon dioxide

Question 18

What is anaerobic respiration in yeasts cells called?

Answer 18

Fermentation

Question 19

When your level of exercise intensity increases, the rate of repiration _________

Answer 19

Increases

Question 20

Why do your muscles need more energy when you exercise?

Answer 20

Energy is needed for more muscle contractions

Question 21

Why do your muscles need more energy when you exercise?

Answer 21

Energy is needed for more muscle contractions

Question 22

Where does the energy come from when you exercise

Answer 22

Comes from increased respiration

Question 23

Why does your breathing rate heart rate increase when you exercise?

Answer 23

To get more oxygen into the blood and then to pump that oxygenated blood faster to get rid pf CO2

Question 24

What is the term “oxygen debt”?

Answer 24

The amount of oxygen you body needs to react with the build up of lactic acid to repay the time your organs couldnt keep up

Question 25

Why does your heart rate, breathing rate and pulse stay high after exercise?

Answer 25

You need to get more oxygen into thr blood so it can repay the oxygen debt

Question 26

What is another way the body can cope with high levels of lactic acid?

Answer 26

The blood can transport the lactic acid into the liver where it can be converted back into glucose