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BIO
BIO 669 QUIZ 5 EXAM (NEW 2025/
2026 UPDATE) QUESTIONS & VERIFIED
ANSWERS| GRADE A| 100% CORRECT
what happens when the lungs lose elasticity? - ANS ✓compliance goes up and
allows for easier expansion, but leads to reduced recoil into a smaller space
(increasing chest space and air way volume)
Where is airway resistance the highest? - ANS ✓in nasal passages
what has the second highest airway resistance? - ANS ✓pharynx
what occurs to the body with widespread acidemia or widespread
insufficiency? - ANS ✓increased bronchi constriction= more difficult to breath
and need to increase respiratory effort
IE. COPD patient gasping for air and fighting harder to breath.
what are the 4 steps of ventilation of the lungs? - ANS ✓1. ventilation of air in
and out of lungs
2. diffusion of oxygen from alveoli out into the capillary blood
BIO 669
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BIO
3. perfusion of systemic capillaries with O2 blood
4. diffusion of O2 from systemic capillaries into the cell.
What is barometric pressure? - ANS ✓measure of pressure of all the mixture of
gases on a given chamber (aside from water pressure)
what do you have more of, perfusion of ventilation? - ANS ✓perfusion
How is saturation determined? - ANS ✓the average of O2 that is binded to the
over all hemoglobin
what happens to saturation when pressure rises? - ANS ✓it rises.
what are examples of interactions that decrease the affinity in the binding
of O2 to hemoglobin? - ANS ✓increased H+ ion, drop in pH, high CO2, increased
temp, 23 DPG
where is 23 DPG made? - ANS ✓the Liver
What is a right shift? - ANS ✓the offloading of hemoglobin in the decrease in
affinity for O2
BIO 669
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BIO
why does hemoglobins affinity increase at the area of the lungs? - ANS
✓there is a lower temperature, rise of pH that is relative to the systemic circuit,
and a low level in carbon dioxide (due to alveolar diffusing CO2
what happens when you go up to a higher altitude? - ANS ✓Left shift-
increased breathing rate due to less o2 to decrease CO2= alkalosis event
What does 2.3 DPG do? - ANS ✓curves the shift back, allowing O2 to be released
from the tissues.
(used in times of altitude sickness)
How is CO2 transported in the blood? - ANS ✓Dissolved in plasma, bound to
hemoglobin/ protein, or as bicarbonate ions in plasma
What is the Haldane effect? - ANS ✓The lower the PO2 and hemoglobin
saturation with O2, the more CO2 can be carried in the blood.
What is the Bohr effect? - ANS ✓the regulation of hemoglobin binding by
hydrogen ions and carbon dioxide
BIO 669
BIO
BIO 669 QUIZ 5 EXAM (NEW 2025/
2026 UPDATE) QUESTIONS & VERIFIED
ANSWERS| GRADE A| 100% CORRECT
what happens when the lungs lose elasticity? - ANS ✓compliance goes up and
allows for easier expansion, but leads to reduced recoil into a smaller space
(increasing chest space and air way volume)
Where is airway resistance the highest? - ANS ✓in nasal passages
what has the second highest airway resistance? - ANS ✓pharynx
what occurs to the body with widespread acidemia or widespread
insufficiency? - ANS ✓increased bronchi constriction= more difficult to breath
and need to increase respiratory effort
IE. COPD patient gasping for air and fighting harder to breath.
what are the 4 steps of ventilation of the lungs? - ANS ✓1. ventilation of air in
and out of lungs
2. diffusion of oxygen from alveoli out into the capillary blood
BIO 669
, 2
BIO
3. perfusion of systemic capillaries with O2 blood
4. diffusion of O2 from systemic capillaries into the cell.
What is barometric pressure? - ANS ✓measure of pressure of all the mixture of
gases on a given chamber (aside from water pressure)
what do you have more of, perfusion of ventilation? - ANS ✓perfusion
How is saturation determined? - ANS ✓the average of O2 that is binded to the
over all hemoglobin
what happens to saturation when pressure rises? - ANS ✓it rises.
what are examples of interactions that decrease the affinity in the binding
of O2 to hemoglobin? - ANS ✓increased H+ ion, drop in pH, high CO2, increased
temp, 23 DPG
where is 23 DPG made? - ANS ✓the Liver
What is a right shift? - ANS ✓the offloading of hemoglobin in the decrease in
affinity for O2
BIO 669
, 3
BIO
why does hemoglobins affinity increase at the area of the lungs? - ANS
✓there is a lower temperature, rise of pH that is relative to the systemic circuit,
and a low level in carbon dioxide (due to alveolar diffusing CO2
what happens when you go up to a higher altitude? - ANS ✓Left shift-
increased breathing rate due to less o2 to decrease CO2= alkalosis event
What does 2.3 DPG do? - ANS ✓curves the shift back, allowing O2 to be released
from the tissues.
(used in times of altitude sickness)
How is CO2 transported in the blood? - ANS ✓Dissolved in plasma, bound to
hemoglobin/ protein, or as bicarbonate ions in plasma
What is the Haldane effect? - ANS ✓The lower the PO2 and hemoglobin
saturation with O2, the more CO2 can be carried in the blood.
What is the Bohr effect? - ANS ✓the regulation of hemoglobin binding by
hydrogen ions and carbon dioxide
BIO 669
