Respiration

Question 1

where does the energy of ATP come from?

Answer 1

Once the glucose molecule has been broken apart, the energy stored in the bonds is released and is then ‘locked up’ in the bonds of a molecule called adenosine triphosphate (ATP)

Question 2

how can ATP release energy

Answer 2

Breaking of final phosphate

Question 3

cellular respiration

Answer 3

exothermic reaction continuously occurring in cells

Question 4

aerobic respiration

Answer 4

respiration with the use of oxygen

Question 5

When do animals use anaerobic respiration ?

Answer 5

vigorous exercise –> body can’t supply enough oxygen

Question 6

Which types of respiration causes a complete breakdown of glucose?

Answer 6

aerobic respiration

Question 7

product of anaerobic respiration

Answer 7

lactic acid

Question 8

Why do we still breathe heavily after completing a hard workout?

Answer 8

The lactic acid builds up in muscle cells and lowers the pH of the cells

This could denature the enzymes in cells so it needs to be removed

This happens by oxidising the lactic acid (combining it with oxygen)

When this happens it can be broken down to carbon dioxide and water

we need to continue getting larger amounts of oxygen into the blood to combine with the lactic acid produced

Question 9

Why is the lack of oxygen a problem for the transport of glucose from the intestine into the villi?

Answer 9

glucose is continuously moved out of intestine, against a gradient

• -> active transport needed
• -> oxygen needed