B9

Question 1

What do organisms use energy transferred by aerobic respiration for?

Answer 1

-Synthesising molecules
-Muscle contraction
-Active transport
-Maintain conditions

Question 2

What happens to your body while you exercise?

Answer 2

-Your HR increases and your blood vessels dilate
-Your breathing rate and volume will increase

Question 3

What is the name of the storage molecule that muscles use to store glucose?

Answer 3

Glycogen

Question 4

What is an oxygen debt?

Answer 4

The extra oxygen needed to break down lactic acid in your body into carbon dioxide and water

Question 5

What are the products of anaerobic respiration in plants and in yeast cells?

Answer 5

Ethanol and carbon dioxide

Question 6

List some functions of the liver:

(Excluding production of bile)

Answer 6

-Amino acids are converted to urea in deamination
-Substances such as ethanol (I think) are detoxified in the liver- breakdown products transported to the kidneys and are excreted
-Old red blood cells broken down- iron stored to make new ones
-Lactic acid is converted to glucose (and is then broken down into carbon dioxide and water during aerobic respiration)

Question 7

Compare anaerobic respiration in yeast and muscle cells:

Answer 7

-Yeast produces ethanol but
muscles produce lactic acid
-Yeast produces CO2 but
muscles do not
-Both release small amounts of
energy