Oxygen in the blood is transported mainly by:
A.Blood plasma
B.WBCs
C.RBCs
D.Platelets
Category: Respiratory System Physiology Mcqs
Oxygen capacity of haemoglobin is:
A.The amount of oxygen which 1 gm of haemoglobin can bind
B.The amount of oxygen which haemoglobin exchanges with similar amount of carbondioxide
C.The amount of oxygen which is present in blood of alveolar circulation
D.None of these
Which of these factors influence our respiratory centre:
A.CO2
B.Water vapour
C.Both (a) & (b)
D.None of these
Which of these facts sugests that oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma:
A.Haemoglobin can combine with oxygen
B.Oxygen carrying capacity of whole blood is higher than that of plasma
C.Oxyhaemoglobin can dissociate into haemoglobin and oxygen
D.Increase in CO2 concentration decrease the O2 affinity of haemoglobin
How can combining of haemoglobin with oxygen in the lungs be promoted?
A.By decreasing the concentration of oxygen in blood
B.By increasing the concentration of oxygen in blood
C.By increasing the concentration of CO2 in blood
D.By inducing CO in the blood
The dissociation of oxyhaemoglobin would increase under a given concentration in blood in case:
A.pH of blood raises
B.pH of blood falls
C.Concentration of CO2 falls
D.Free fatty acid concentration falls in blood
Respiration in absence of oxygen is termed:
A.Aerobic
B.Anerobic
C.Both (a) & (b)
D.None of these
The atmosphere of industrial area loaded with chimines is considered harmful to health because:
A.There is more and more carbondioxide
B.There is carbonmomonoxide which can bind with Hb 230 times more than oxygen and its pressure of about 0.7 mm Hg is lethal
C.There is more water vapour which makes breathing difficult
D.The air has very low percentage of oxygen
Which of these is termed Bohr effect:
A.Deoxygenation of oxyhaemoglobin is directly proportional to PCO2
B.Oxygen carrying capacity of whole blood is higher than plasma
C.Increase in CO2 concentration decreases O2 affinity of Hb
D.None of these
Which of these statements are correct:
A.All of the animals need a medium for cellular respiration
B.Oxygen is transported in all animals by blood
C.All animals take oxygen from water or air through lungs or gills
D.All animals need oxygen for their respiration
