CHAPTER 7 GASEOUS EXCHANGE SB025 BIOLOGY

Tick ANY relevant answers. The oxygen dissociation curve (ODC) shows that in lungs;

• Hemoglobins are 98% saturated with oxygen

• There are higher partial pressure of oxygen than partial pressure of carbon dioxide

• Hemoglobin has higher affinity towards carbon dioxide than oxygen

• Hemoglobin are saturated with oxygen

Tick ANY relevant answers. The ODC shows that in tissues during resting;

• Hemoglobin is fully saturated with oxygen

• There is a reduction of hemoglobin affinity towards oxygen

• Oxygen dissociates from hemoglobin to the tissues

• There is an increase of hemoglobin-oxygen saturation

Tick ANY relevant answers. The ODS shows that in tissues during exercise,

• The partial pressure of oxygen is very low

• There is a very robust dissociation of oxyhemoglobin to oxygen and hemoglobin

• The percentage of oxygen saturation in hemoglobin is about 18%

• It is shown by the steepest part of the curve

What can be concluded when the curve of ODC is displaced more to the right?

• The less readily the hemoglobin to pick up oxygen

• The more readily the hemoglobin to pick up oxygen

• The easier the hemoglobin to release oxygen

• The harder the hemoglobin to release oxygen

What can be concluded when the curve of ODC is displaced more to the left?

• The less readily the hemoglobin to pick up oxygen

• The more readily the hemoglobin to pick up oxygen

• The easier the hemoglobin to release oxygen

• The harder the hemoglobin to release oxygen

Based on the figure given, which curve represents ODC for myoglobin?

• A

• B

• C

• D

The ODC of myoglobin has (a)   shape.

On the other hand, the ODC of hemoglobin has (a)   shape.

What can be analysed from the ODC of myoglobin vs hemoglobin in term of the dissociation of oxyhemoglobin?

• Only at very low partial pressure of oxygen that the oxygen will be released from myoglobin compared to hemoglobin

• Only at very low partial pressure of oxygen that the oxygen will be released from hemoglobin compared to myoglobin

Based on the analysis of ODC of myoglobin vs hemoglobin, which pigment is more suitable to function as oxygen storage?

(a)