The oxygen carrying capacity of haemoglobin is directly proportional to the partial pressure of ……….
a) air
b) oxygen
c) water
d) carbon dioxide
Explanation: Blood gas tension refers to the partial pressure of gases in blood.
What is the maximum oxygen carrying capacity of arterial blood per 100 ml?
a) 10 ml
b) 20 ml
c) 14.4 ml
d) 5 ml
Explanation: (100% saturation)
100% saturation of arterial blood is achieved at…….mm Hg partial pressure of oxygen (PO2).
a) 20
b) 50
c) 80
d) 100
What is the amount of haemoglobin per 100 ml of blood?
a) 5 g
b) 10 g
c) 15 g
d) 20 g
1 gram of haemoglobin can combine with …….ml of oxygen.
a) 1 ml
b) 1.34 ml
c) 2 ml
d) 2.34 ml
Explanation: 1.34*15=20 ml of oxygen per 100 ml of blood
Normally each 100 ml of arterial blood contains…….ml of oxygen.
a) 20
b) 19.4
c) 14.4
d) 5
Explanation: 97% saturation at 95 mm Hg PO2
