Page 1 of 153
Bio 235 Final Exam Athabasca NEWEST ALL 500
QUESTIONS AND VERIFIED SOLUTIONS 2026-2027
LATEST UPDATE THIS YEAR
BIO 235 Final Exam
which structure is NOT part of the "anatomical dead space?"
a) bronchiole
b) trachea
c) bronchus
d)respiratory bronchiole - ANSWER-d)respiratory bronchiole
the volume of air flowing into the alveoli during inhalation/inspiration is increased when there
is an increase in which of these?
a)air resistance
b)the pressure gradiant from the atmosphere to the alveoli
c) the pressure in the intrapleural space
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d) the curvature of the diaphragm - ANSWER-b)the pressure gradiant from the atmosphere to
the alveoli
under normal circumstances, which of the following would result from an increase in
transpulmonary pressure?
a) inhalation/inspiration
b) exhalation/expiration
c) a collapsed lung
d) emphysema - ANSWER-a) inhalation/inspiration
which of the following statements about the response of arteriole smooth muscle to changing
ocygen partial pressure is true?
a) both systemic and pulmonary arterioles respond to a decrease in PO2 by constricting
b) both systemic and pulmonary arterioles respond to a decrease in PO2 by dilating
c) systemic arterioles respond to a decrease in PO2 by dilating but pulmonary arterioles
constrict in response to decreased PO
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d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary arterioles
dilate in response to decreased PO2 - ANSWER-c) systemic arterioles respond to a decrease in
PO2 by dilating but pulmonary arterioles constrict in response to decreased PO
during an unforced exhalation/expiration, which would NOT be true?
a) alveolar pressure is greater than atmospheric pressure
b) intrapleural pressure is greater than alveolar pressure
c) intrapleural pressure becomes less negative
d) the diaphragm relaxes - ANSWER-b) intrapleural pressure is greater than alveolar pressure
which true regarding how gases dissolve in liquids?
a0 the concentration of a gas in a liquid equilibrates to match the concentration of that gas in
the air to which of the liquid is exposed
b) different gasses have the same solubility in liquids
c) the partial pressure of a gas in a liquid is equal to the amount greatly diffusing in the liquid
plus the amount bound to large molecules within the liquid
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d) the partial pressure of a particular gas in a liquid equilibrates to match the partial pressure o
that gas in the air to which the liquid is exposed - ANSWER-d) the partial pressure of a particular
gas in a liquid equilibrates to match the partial pressure o that gas in the air to which the liquid
is exposed
which of these results from hyperventilation?
a) increased alveolar PCO2 and decreased alveolar PO2
b) an increase in both PO2 & PO2
c) decreased alveolar PCO2 & increased alveolar PO2
d) a decrease in both alveolar PCO2 & PO2 - ANSWER-c) decreased alveolar PCO2 & increased
alveolar PO2
In which form is most of the oxygen carried in arterial blood?
a) bound to hemoglobin
b) dissolved in the plasma
c) dissolved in the cytosol of erthrocytes
d) converted to HCO3 - ANSWER-a) bound to hemoglobin
Bio 235 Final Exam Athabasca NEWEST ALL 500
QUESTIONS AND VERIFIED SOLUTIONS 2026-2027
LATEST UPDATE THIS YEAR
BIO 235 Final Exam
which structure is NOT part of the "anatomical dead space?"
a) bronchiole
b) trachea
c) bronchus
d)respiratory bronchiole - ANSWER-d)respiratory bronchiole
the volume of air flowing into the alveoli during inhalation/inspiration is increased when there
is an increase in which of these?
a)air resistance
b)the pressure gradiant from the atmosphere to the alveoli
c) the pressure in the intrapleural space
,Page 2 of 153
d) the curvature of the diaphragm - ANSWER-b)the pressure gradiant from the atmosphere to
the alveoli
under normal circumstances, which of the following would result from an increase in
transpulmonary pressure?
a) inhalation/inspiration
b) exhalation/expiration
c) a collapsed lung
d) emphysema - ANSWER-a) inhalation/inspiration
which of the following statements about the response of arteriole smooth muscle to changing
ocygen partial pressure is true?
a) both systemic and pulmonary arterioles respond to a decrease in PO2 by constricting
b) both systemic and pulmonary arterioles respond to a decrease in PO2 by dilating
c) systemic arterioles respond to a decrease in PO2 by dilating but pulmonary arterioles
constrict in response to decreased PO
,Page 3 of 153
d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary arterioles
dilate in response to decreased PO2 - ANSWER-c) systemic arterioles respond to a decrease in
PO2 by dilating but pulmonary arterioles constrict in response to decreased PO
during an unforced exhalation/expiration, which would NOT be true?
a) alveolar pressure is greater than atmospheric pressure
b) intrapleural pressure is greater than alveolar pressure
c) intrapleural pressure becomes less negative
d) the diaphragm relaxes - ANSWER-b) intrapleural pressure is greater than alveolar pressure
which true regarding how gases dissolve in liquids?
a0 the concentration of a gas in a liquid equilibrates to match the concentration of that gas in
the air to which of the liquid is exposed
b) different gasses have the same solubility in liquids
c) the partial pressure of a gas in a liquid is equal to the amount greatly diffusing in the liquid
plus the amount bound to large molecules within the liquid
, Page 4 of 153
d) the partial pressure of a particular gas in a liquid equilibrates to match the partial pressure o
that gas in the air to which the liquid is exposed - ANSWER-d) the partial pressure of a particular
gas in a liquid equilibrates to match the partial pressure o that gas in the air to which the liquid
is exposed
which of these results from hyperventilation?
a) increased alveolar PCO2 and decreased alveolar PO2
b) an increase in both PO2 & PO2
c) decreased alveolar PCO2 & increased alveolar PO2
d) a decrease in both alveolar PCO2 & PO2 - ANSWER-c) decreased alveolar PCO2 & increased
alveolar PO2
In which form is most of the oxygen carried in arterial blood?
a) bound to hemoglobin
b) dissolved in the plasma
c) dissolved in the cytosol of erthrocytes
d) converted to HCO3 - ANSWER-a) bound to hemoglobin
