Carbon dioxide is transported in blood in how many ways?
a) two
b) three
c) four
d)five
Explanation: 1. As bicarbonate ions, 2. As carboxyhaemoglobin and 3. As dissolved carbon dioxide in plasma
How much percentage of carbon dioxide is carried in the blood as bicarbonate ions?
a) 15%
b) 30%
c) 70%
d) 90%
Carbon dioxide diffuses into the blood and combines with ……..to form carbonic acid.
a) haemoglobin
b) water
c) NaCl
d) hormones
Explanation:CO2 + H2O à H2CO3
Which of the following enzyme is required to combine carbon dioxide and water to produce carbonic acid?
a) carboxylase
b) reductase
c) carbonic anhydrase
d) protease
Carbonic acid produced in blood is unstable compound. Which of the following is/are form after its dissociation?
a) H+ ions
b) bicarbonate ions HCO3-
c) OH- ions
d) both a and b
Explanation: this reaction also takes place in the presence of enzyme carbonic anhydrase
Accumulation of which of the following ions increases the acidity in the blood?
a) H+ ions
b) bicarbonate ions HCO3-
c) OH- ions
d) sodium ions
Explanation: increase in Hydrogen ion decreases the pH
