paper 1: Sect A

Question 1

explain what the Bohr shift is.

Answer 1

when an increase in carbon dioxide (and a decrease in blood PH) results in a reduction of the affinity of haemoglobin for oxygen.

Question 2

state the 3 main causes of the Bohr shift, explain each.

Answer 2

1. increase in blood temperature: causes oxygen to dissociate from Hb more readily
2. when the partial pressure of carbon dioxide of the blood increases
3. a drop in blood PH causes oxygen to dissociate from the blood more readily

Question 3

which way does the oxyhaemoglobin dissociation curve move during exercise.

Answer 3

to the right.

Question 4

state the 4 ways to measure energy expenditure

Answer 4

indirect calorimetry
lactate sampling
VO2 max test
respiratory exchange ratio