BIO ONLINE CLASS TEST #2

Which statement about the Bohr effect is correct?

• Increasing the partial pressure of carbon dioxide shifts the dissociation curve of haemoglobin to the left.

• Decreasing the partial pressure of carbon dioxide decreases the percentage of oxyhaemoglobin.

• In low concentrations of carbon dioxide haemoglobin has a low affinity for oxygen.

• Increasing the partial pressure of carbon dioxide decreases the percentage of oxyhaemoglobin.

Haemoglobin can bind with some gases at different binding sites.

Which statement about the binding sites of haemoglobin is correct?

• oxygen and carbon monoxide binds to haem group, carbon dioxide binds to amine terminal of Hb polypeptide.

• oxygen and carbon dioxide binds to haem group, carbon monoxide binds to amine terminal of Hb polypeptide.

• carbon monoxide and carbon dioxide binds to haem group, oxygen binds to carboxyl terminal of Hb polypeptide.

• oxygen and carbon monoxide binds to haem group, carbon monoxide binds to carboxyl terminal of Hb polypeptide.

Mammals have a double circulation system. Double circulation means...

• The blood circulates separately in the two sides of the heart.

• The blood passes twice through the heart during one complete circulation.

• The heart has two of each chamber; atria and ventricles.

• The heart beat has a double sound caused by the two sets of valves closing.

Which option correctly describes the changes in the haemoglobin as a result of the Bohr shift?

• A

• B

• C

• D

Which reactions will NOT be taking place in blood that is passing through active tissues?

• H2CO3 → H+ + HCO3-

• HbO8 + H+ → HHb + 4O2

• H2O + CO2 → H2CO3

• HCO3– + H+ → H2CO3

Which will normally be formed in the blood surrounding active tissue?

• carbaminohaemoglobin, carboxyhaemoglobin, and haemoglobinic acid

• carboxyhaemoglobin, hydrogen carbonate ions, and haemoglobinic acid

• carbaminohaemoglobin, hydrogen carbonate ions, and haemoglobinic acid

• oxyhaemoglobin, carbaminohaemoglobin, and hydrogen carbonate ions

Which statement correctly compares blood plasma and tissue fluid in a healthy person?

• Blood plasma contains more protein than tissue fluid.

• Tissue fluid is formed from blood plasma and is not returned to blood plasma.

• Tissue fluid contains white blood cells whereas blood plasma does not.

• Both blood plasma and tissue fluid contain red blood cells.

What causes blood plasma to become tissue fluid?

• Hydrostatic pressure forces it out of the arteriole end of the capillary

• Hydrostatic pressure forces it out of the venule end of the capillary

• High water potential in the capillary relative to tissues causes osmosis

• High osmotic pressure in the capillary relative to the tissues causes movement of water

Which statement is true?

• blood plasma at the venule end contains more oxygen than the arteriole end

• blood plasma at the venule end contains more carbon dioxide than the arteriole end

• blood plasma at the arteriole end contains more urea than the venule end

• blood plasma at the arteriole end contains more platelets than the venule end

What causes the reabsorption of tissue fluid back into plasma?

• Low osmotic pressure in the tissues combined with low hydrostatic pressure in the capillary

• Low osmotic pressure in the tissues combined with high hydrostatic pressure in the capillaries

• High osmotic pressure in the tissues combined with high hydrostatic pressure in the capillary

• High osmotic pressure in the tissues combined with low hydrostatic pressure in the capillary