Transport of O2

Question 1

Definition of haemoglobin

Answer 1

Found in red blood cells that attach with oxygen to form oxyhaemoglobin

Question 2

Definition of myoglobin

Answer 2

Protein that is stored in the muscle and it dissociates/takes oxygen from haemoglobin as it has a higher affiliation for oxygen

Question 3

Definition of mitochondria

Answer 3

Protein which provides energy for respiration

Question 4

What is the oxyhemoglobin
dissociation curve

Answer 4

Is a ‘s’ shape curve that shifts to the right

Question 5

What happens to the oxyhemoglobin dissociation curve at the lungs

Answer 5

The percentage saturation of haemoglobin is always 100% (4 molecules) and will not change rest to exercise

Question 6

What happens to the oxyhemoglobin dissociation curve at the muscle during exercise

Answer 6

• Oxygen is released from oxyhemoglobin due to the lower pressure of oxygen in the muscle.
• The oxygen dissociates from oxyhemoglobin as myoglobin has higher affinity for oxygen
• Taken to the mitochondria

Question 7

What is the Bohr shift

Answer 7

During exercise the oxyhemoglobin dissociation curve (‘s’ shape), shifts to the right as muscles demand more oxygen from haemoglobin occurs more readily

Question 8

What are the three factors that affect Bohr shift

Answer 8

1. Increase in blood temperature
2. PCO2 increases
3. pH lowers due to CO2