Only accept 40 if 4 in stage 1 Both for 1 mark ii ADP and Pi phosphate Any 1 Both incorrect numbers iii muscle respiration/photosynthesis/ contraction/movement/synthesis metabolism/reproduction/heat/ (of proteins)/growth/cell warmth/temperature division/transmission of nerve impulses/heat production/glycolysis (and any other correct) Int 2 The below shows how altitude affects the percentage oxygen carried in blood. 2012 B Q3 (b) Use the data in the table to explain why a runner who lives at an altitude of 2800 metres would fatigue more quickly if racing in an event at 4700 metres. 2 Question Acceptable Answer Not acceptable Negates Mark 9 (b) % oxygen (in blood) will fall from 91% to 80%/ by 11% 2 Oxygen debt
Only accept 40 if 4 in stage 1 Both for 1 mark ii ADP and Pi Both phosphate Any incorrect numbers 1 iii muscle contraction/movement/synthesis (of proteins)/growth/cell division/transmission of nerve impulses/heat production/glycolysis (and any other correct) respiration/photosynthesis/ metabolism/reproduction/heat/ warmth/temperature Int 2 2012 B Q3 (b) The below shows how altitude affects the percentage oxygen carried in blood. Use the data in the table to explain why a runner who lives at an altitude of 2800 metres would fatigue more quickly if racing in an event at 4700 metres. 2 Question Acceptable Answer Not acceptable Negates Mark 9 (b) % oxygen (in blood) will fall from 91% to 80%/ by 11% 2 Oxygen debt