WorksheetsGaseous Exchange & Its Control (C02 Transportation)
Total questions: 10
Worksheet time: 20mins
Which of the following is NOT the structure of haemoglobin?
Each haemoglobin molecule contains 4 haem group
Haemoglobin is a quaternary structure
Every each haem group in haemoglobin can bind with 4 molecule of oxygen
Each haemoglobin has 2 α-chain and 2 β-chain polypeptide subunits
Oxyhaemoglobin gives up O2 when …
CO2 concentrations are high.
Body temperature is lowered.
pH values are high.
O2 concentrations are higher.
Most of the carbon dioxide produced by the body tissue is transported to the lungs in the form of …
Carbonic acid.
Blood plasma.
Bicarbonate ion.
Carbaminohaemoglobin.
In the chloride shift, ________________ move into the erythrocyte to replace the ______________ that move out.
Chloride ions; carbon dioxide molecules.
Carbon dioxide molecules; chloride ions.
Bicarbonate ions; chloride ions.
Chloride ions; bicarbonate ions.
The acidity due to the accumulation of H+ in erythrocytes is buffered by …
Haemoglobin.
Plasma proteins.
Carbon dioxide.
Oxygen.
Carbonic anhydrase in the erythrocytes …
Catalyzes the removal of oxygen from the erythrocytes.
Catalyzes the conversion of carbon dioxide into water.
Catalyzes the reaction of carbon dioxide with water to form carbonic acid.
Catalyzes the increase in blood pH.
Each haemoglobin molecule can bind reversibly with
one atom of oxygen
one molecule of oxygen
two molecules of oxygen
four molecules of oxygen
Which of the following is the primary enzyme that involved in the transport of carbon dioxide in blood?
Synthetase
Carbonic anhydrase
Dehydrogenase
Decarboxylase
Which of the following is not the characteristics of haemoglobin?
Has high affinity towards oxygen
Easily releases oxygen when the partial pressure of oxygen is low
Shows allosteric cooperatively binding characteristic
Carbon dioxide can also bind to haem group of haemoglobin
The chloride shift in the blood is the movement of
Chloride ions into the alveolar space
Chloride ions into tissue cells to maintain the electrochemical neutrality
Chloride ions into erythrocyte to balance the bicarbonate ions that move into the cell
Chloride ions into erythrocyte to maintain the electrochemical neutrality
