Gaseous Exchange & Its Control (C02 Transportation)

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.

Tags

NGSS.HS-LS1-3

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