Mass Transport In Humans Flashcards
Oxyhaemoglobin dissociation curve
Oxygen loaded at high particle pressure and unloaded in low particle pressure
Cooperative binding
Affinity of oxygen changes depending on how many oxygen molecules it’s already associated with
As oxygen molecules bind tertiary structure of haemoglobin changes
Freeing up next binding site making it easier to bind
Different haemoglobin
Myoglobin = very high affinity for oxygen at even low partial pressure
Acts as oxygen store
Bohr shift
High conc of carbon dioxide causes curve to move to the right
Affinity for oxygen decreases due to acidic changing structure of haemoglobin
High altitude animals
Low partial pressure of oxygen
So need higher affinity
So despite low partial pressure loading still occurs
Bohr shift
Animals with higher metabolism like fast moving rodents and birds need more oxygen to provide to respiring tissue to provide energy for muscles
Structure of heart
Right atrium left atrium
Right ventricle left ventricle
Cardiac output =
Stroke volume x heart rate
Where does the pullmanary artery carry blood to
The lungs
Where does the vena carva transport blood to
Right atrium ( deoxygenated )
Where does the pulmonary vein transport blood to
Left atrium ( oxygenated )
Explain blood flow into the heart
- Vena cava transports deoxygenated blood into the right atrium
- Blood moves down into the right ventricle
- Leaves out pulmonary artery to lungs
- Oxygenated blood into heart via pulmonary vein into left atrium
- Down to left ventricle
- Leaves via aorta to rest of the body
- Coronary artery bring oxygenated blood to heart muscles for contractions
Heart contraction
Systole
Heart relaxing
Diastole
2 valve in heart
- AV valve - atria ventricular
- Semi lunar valve
