The following diagrams depict the movement of gas molecules (green dots) between

Question

The following diagrams depict the movement of gas molecules (green dots) between the moist surface of an alveolus (white space), the blood plasma within a capillary in the lungs (pink space), and the cytoplasm of a red blood cell within the capillary (grey space).

Question #1

In Diagram A, the green dots depict _____ molecules. CO2 or O2

This gas diffuses out of the blood, because the partial pressure of this gas is ____ inside the capillary than outside the capillary. Higher or Lower

Question #2

In Diagram B, the green dots depict _____ molecules. CO2 or O2

This gas diffuses into the blood, because the partial pressure of this gas is ____ inside the capillary than outside the capillary. Higher or Lower

Question #3

Examine the slope of the curve. From the slope, you can tell that small (about 10 mm Hg) changes to the P_O2 have a more significant effect on hemoglobin saturation in the blood in the ___________. systemic capillaries or pulmonary capillaries

The dissociation curve can change depending on local blood chemistry. For example, an increase in acidity shifts the curve to the __right or left__. What is the result of such a shift?

a. This change decreases the affinity of hemoglobin for O_2, which encourages O_2 unloading.

b. This change increases the affinity of hemoglobin for O_2, which encourages O_2 binding.  

Diagram A Diagram B Dissolved o O Disso Dissolved o Disso oo O Dissolvedo Bound to Hemoglobin Disso Converted by a chemical reaction

Explanation / Answer

Question #1

In Diagram A, the green dots depict _CO2_molecules.

This gas diffuses out of the blood because the partial pressure of this gas is _higher_ inside the capillary than outside the capillary.

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Question #2

In Diagram B, the green dots depict _O2_ molecules. CO2 or O2

This gas diffuses into the blood because the partial pressure of this gas is _lower_ inside the capillary than outside the capillary.

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Question #3

changes to the P_O2 have a more significant effect on hemoglobin saturation in the blood in the _systemic capillaries.

The dissociation curve can change depending on local blood chemistry. For example, an increase in acidity shifts the curve to the __right or left__. What is the result of such a shift?

Answer-  a. This change decreases the affinity of hemoglobin for O_2, which encourages O_2 unloading. - this is called as Bohr shift.

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