Hole's Human Anatomy & Physiology (Shier), 12th Edition

Ph.I.L.S. 3.0 Quizzing 25: Ph.I.L.S. 3.0 Quizzing

Ph.I.L.S. 3.0 Quizzing

1
The oxygen dissociation curve shows that as the partial pressure of oxygen is decreased to a very low level, the amount of oxygen bound to hemoglobin:
A)increases.
B)does not change.
C)decreases.
2
Look at your graph. A high transmittance value (‘color') indicates:
A)a large amount of oxygen is bound to hemoglobin.
B)a small amount of oxygen is bound to hemoglobin.
C)no oxygen is bound to hemoglobin.
D)nothing with respect to the amount of oxygen bound to hemoglobin.
3
Adding 2,3-diphosphoglycerate (DPG) to blood:
A)moves the oxygen dissociation curve to the left.
B)moves the oxygen dissociation curve to the right.
C)has no effect on the oxygen dissociation curve.
4
Look at the two curves on your graph, about one-third of the way from zero mark on the horizontal axis (a PO2 value around 50 mm Hg). Imagine a vertical line that intersects the curves:
A)The blood with DPG has a lower transmittance value (‘color').
B)The blood with DPG has the same transmittance value (‘color') as blood without DPG.
C)The blood with DPG has a higher transmittance value (‘color').
5
Look at the two curves on your graph, about one-third of the way from zero mark on the horizontal axis (a PO2 value around 50 mm Hg). Imagine a vertical line that intersects the curves.
A)The blood with DPG has more oxygen bound to hemoglobin.
B)The blood with DPG has the same amount of oxygen bound to hemoglobin.
C)The blood with DPG has less oxygen bound to hemoglobin.
6
At PO2 levels around 50 mm Hg (approximately the same PO2 value found in the tissues), DPG:
A)decreases the amount of bound oxygen; i.e., hemoglobin releases more oxygen to the tissues.
B)does not change the amount of bound oxygen; i.e., the amount of oxygen released is constant.
C)increases the amount of bound oxygen; i.e., hemoglobin releases less oxygen to the tissues.
7
Look at the two curves on your graph, about two-thirds of the way from zero mark on the horizontal axis (a PO2 value around 100 mm Hg). Imagine a vertical line that intersects the curves.
A)The blood with DPG has a lower transmittance value (‘color').
B)The blood with DPG has the same transmittance value (‘color') as blood without DPG.
C)The blood with DPG has a higher transmittance value (‘color').
8
Look at the two curves on your graph, about two-thirds of the way from zero mark on the horizontal axis (a PO2 value around 100 mm Hg). Imagine a vertical line that intersects the curves:
A)the blood with DPG has more oxygen bound to hemoglobin.
B)the blood with DPG has the same amount of oxygen bound to hemoglobin.
C)the blood with DPG has less oxygen bound to hemoglobin.
9
At PO2 levels around 100 mm Hg (approximately the same PO2 value found in the lungs), DPG:
A)decreases the amount of bound oxygen; i.e., hemoglobin picks up less oxygen.
B)does not change the amount of bound oxygen; i.e., the amount of oxygen picked up is constant.
C)increases the amount of bound oxygen; i.e., hemoglobin picks up more oxygen.
10
DPG pushed the oxygen dissociation curve to the right which:
A)promotes loading of oxygen at the lungs and decreases unloading of oxygen at the tissues.
B)promotes loading of oxygen at the lungs and promotes unloading of oxygen at the tissues.
C)decreases loading of oxygen at the lungs and decreases unloading of oxygen at the tissues.
D)decreases loading of oxygen at the lungs and promotes unloading of oxygen at the tissues.
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