Oxygenation Flashcards
Carbonic anhydrase is an enzyme found in …
Erythrocytes
Carbonic acid formation promotes the release of …
Oxygen from oxyhemoglobin
Haemoglobin comprises of …
2 beta chains and 2 gamma chains
Haemoglobin unloads oxygen into tissue where …
pH is decreased and pO2 is 40 mmHg
Higher levels of carbon dioxide in the tissues shift the oxygen-haemoglobin dissociation curve …
Right
Partial pressures may be expressed as …
Percentage, mmHg and kilopascals
The atmosphere contains …
79% nitrogen, 0.03% carbon dioxide and 21% oxygen
The pCO2 of alveolar air is …
40 mmHg
The pCO2 of deoxygenated systemic venous blood is …
45 mmHg
The pO2 of alveolar air is …
104 mmHg
The primary site of gas exchange is …
The alveoli
The proportion of carbon dioxide carried a bicarbonate in blood plasma is …
70%
The proportion of carbon dioxide carried by haemoglobin is approximately …
23%
The proportion of oxygen carried by haemoglobin within erythrocytes is …
97%
The term partial pressure means …
The pressure exerted by one gas in a mixture of gases
