Transport of O2 Flashcards
Definition of haemoglobin
Found in red blood cells that attach with oxygen to form oxyhaemoglobin
Definition of myoglobin
Protein that is stored in the muscle and it dissociates/takes oxygen from haemoglobin as it has a higher affiliation for oxygen
Definition of mitochondria
Protein which provides energy for respiration
What is the oxyhemoglobin
dissociation curve
Is a ‘s’ shape curve that shifts to the right
What happens to the oxyhemoglobin dissociation curve at the lungs
The percentage saturation of haemoglobin is always 100% (4 molecules) and will not change rest to exercise
What happens to the oxyhemoglobin dissociation curve at the muscle during exercise
- 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
What is the Bohr shift
During exercise the oxyhemoglobin dissociation curve (‘s’ shape), shifts to the right as muscles demand more oxygen from haemoglobin occurs more readily
What are the three factors that affect Bohr shift
- Increase in blood temperature
- PCO2 increases
- pH lowers due to CO2