PrepBharat

1. Dissociation curve is connected with
a) Myoglobin
b) CO
c) \[O_{2}\]
d) Oxyhaemoglobin

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2. A large proportion of oxygen is left unused in the human blood even after uptake by the body tissue. This oxygen
a) Is enough to keep oxyhaemoglobin saturation at 96%
b) Helps in releasing more oxygen to epithelial tissues.
c) Acts as reserve during muscular exercise.
d) Raise \[pCO_{2}\] of blood to 75 mm Hg.

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3.Oxygen dissociation curve is
a) Parabola
b) Sigmoid
c) Hyperbola
d) Straight line

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4. Binding of oxygen with haemoglobin can be affected by
a) \[pCO_{2}\]
b) H+ conc
c) Temperature
d) All of these

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5. The amount of \[O_{2}\] normally carried by 100 ml of pure blood is
a) 10 ml
b) 20 ml
c) 5 ml
d) 4 ml

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6. How much oxygen is delivered to tissue by 100 ml of oxygenated blood under normal physiological condition?
a) 10 ml
b) 20 ml
c) 5 ml
d) 4 ml

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7. How much carbon dioxide is delivered to alveoli by 100 ml of deoxygenated blood under normal physiological condition?
a) 10 ml
b) 20 ml
c) 5 ml
d) 4 ml

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8. Oxygen binding to haemoglobin is
a) Directly proportional to \[CO_{2}\] concentration
b) Directly proportional to CO concentration
c) Inversely proportional to \[CO_{2}\] concentration
d) Independent of CO concentration

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9. The most characteristic feature of haemoglobin is
a) Its red colour
b) Presence of iron
c) Its ability to combine reversibly with oxygen
d) Presence of basic protein globin

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10.Factors at tissue level favours the dissociation of oxygen from oxyhaemoglobin
a) Low \[pO_{2}\] , low \[pCO_{2}\] , high H⁺, low temperature
b) High \[pO_{2}\] , high \[pCO_{2}\] , low H⁺, high temperature
c) Low \[pO_{2}\] , high \[pCO_{2}\] , high H⁺, high temperature
d) Low \[pO_{2}\] , high \[pCO_{2}\] , high H⁺, low temperature

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