Bohr Shift

Question 1

What is haemoglobin?

Answer 1

A protein that can carry 4 oxygens

Question 2

What determines the amount of O2 that associates with haemoglobin?

Answer 2

The pO2

Question 3

What happens if the pO2 is high?

Answer 3

O2 is more easily associated to form oxyhaemoglobin

Question 4

At the alveoli is the pO2 high or low?

Answer 4

It is high at the alveoli
100mmHg

Question 5

What is the blood that leaves the alveoli like?

Answer 5

Almost 100% saturated with oxygen

Question 6

What happens with the pO2 decreases as blood enters the capillaries?

Answer 6

The haemoglobin will readily dissociate with O2
Releasing O2 to the working muscles

Question 7

What is the relationship on the graph called?

Answer 7

The oxyhaemoglobin dissociation curve

Question 8

6 marker- Bohr Shift

Answer 8

-Dissociation curves moves to the right in exercise
-this is known as the Bohr Shift
-by moving to the right, O2 dissociates more easily due to increase in CO2
-increased body temperature
-lower blood pH
-moving to the right, oxygen dissociates easier and will therefore move into the muscle cells where we need it