Bio 235 Final Exam Questions with Complete
Solutions
lung compliance is defined as
a) lung volume/ transpulmonary pressure
b) transpulmonary pressure/ lung volume
c) transthoracic pressure/ atmospheric pressure
d) none of the above Correct Answ_d) none of the above
trained athletes tend to have
a) increased lung compliance
b) normal lung compliance
c) decreased lung compliance
d) asthma Correct Answ_a) increased lung compliance
which is true abbout the pleural sac
a)it is continuous with the atmosphere and protects the lungs from infections
b) it is a closed sac surrounding each lung and contains only a tiny volume of lubricating fluid
,c) it is a closed sac surrounding each lung and contain a large volume of surfactact
d) it is a closed, air-filled space surrounding both lungs that has a negative pressure compared to
atmospheric pressure Correct Answ_b) it is a closed sac surrounding each lung and contains
only a tiny volume of lubricating fluid
which structure is NOT part of the "anatomical dead space?"
a) bronchiole
b) trachea
c) bronchus
d)respiratory bronchiole Correct Answ_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
d) the curvature of the diaphragm Correct Answ_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 Correct Answ_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
d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary arterioles
dilate in response to decreased PO2 Correct Answ_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 Correct Answ_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
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 Correct Answ_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
Solutions
lung compliance is defined as
a) lung volume/ transpulmonary pressure
b) transpulmonary pressure/ lung volume
c) transthoracic pressure/ atmospheric pressure
d) none of the above Correct Answ_d) none of the above
trained athletes tend to have
a) increased lung compliance
b) normal lung compliance
c) decreased lung compliance
d) asthma Correct Answ_a) increased lung compliance
which is true abbout the pleural sac
a)it is continuous with the atmosphere and protects the lungs from infections
b) it is a closed sac surrounding each lung and contains only a tiny volume of lubricating fluid
,c) it is a closed sac surrounding each lung and contain a large volume of surfactact
d) it is a closed, air-filled space surrounding both lungs that has a negative pressure compared to
atmospheric pressure Correct Answ_b) it is a closed sac surrounding each lung and contains
only a tiny volume of lubricating fluid
which structure is NOT part of the "anatomical dead space?"
a) bronchiole
b) trachea
c) bronchus
d)respiratory bronchiole Correct Answ_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
d) the curvature of the diaphragm Correct Answ_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 Correct Answ_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
d) systemic arterioles respond to a decrease in PO2 by constricting but pulmonary arterioles
dilate in response to decreased PO2 Correct Answ_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 Correct Answ_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
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 Correct Answ_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
