1
BIO 233 FINAL EXAM NEWEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS 100% CORRECT
GUARANTEED SUCCESS
There is no net air flow into or out of the lungs whena) P alveolus = P atmosphere
b) P alveolus< P atmosphere
c) P pleural wall > P atmosphere
d) P atmosphere< P pleural wall
a) P alveolus = P atmosphere
The upper respiratory tract differs from the lower respiratory tract in what way?
A) air is taken in through the lower respiratory tract, and CO2/O2 are exchanged in
the upper respiratory tract
b) air is taken in through the upper respiratory tract, and CO2/O2 are exchanged
in the lower respiratory tract
c) CO2 is removed from circulation in the upper respiratory tract
d) O2 is removed from circulation in the lower respiratory tract
B. Air is taken in through the upper respiratory tract, and CO2/O2 are exchanged
in the lower respiratory tract
Smooth muscle surrounds which structure of the lower respiratory tract?
a) Alveoli
b) Alveolar capillaries
c) Terminal bronchioles
d) Trachea
, 2
C. terminal bronchioles
In the alveolus, ____squamous epithelial cells are responsible for ___, while
___cells are responsible for ____.
a) Type 1; surfactant secretion; Type 2, gas exchange
b) type 1; debris removal; type 2; surfactant secretion
c) type 3; debris removal; type 1; gas exchange
d) type 1; gas exchange; type 2: surfactant secretion
d) type 1; gas exchange; type 2: surfactant secretion
What keeps the lungs from collapsing
Check the
b) trans pulmonary negative pressure caused by negative pressure from pleural
cavity
Identify the correct sequence of events for inspiration
a) diaphragm & inspiratory intercostals relax, lungs expand, air flows into alveoli
b) diaphragm & inspiratory intercostals contract; lungs expand, air flows out of the
alveoli
c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into
alveoli
d)diaphragm & expiratory intercostals relax, lungs contract, air flows out of alveoli
c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into
alveoli
the main determiners of lung compliance are
a) lung tissue thickness, surface tension of fluid on the inner lung surface
b) lung tissue perforations, surface tension of fluid on the inner lung surface
c) lung tissue surface area, surface tension of fluid on the inner lung surface
, 3
d) lung tissue thickness, surface tension of fluid on the outer lung surface
a) lung tissue thickness, surface tension of fluid on the inner lung surface
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
d) none of the above
trained athletes tend to have
a) increased lung compliance
b) normal lung compliance
c) decreased lung compliance
d) asthma
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
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
, 4
b) trachea
c) bronchus
d)respiratory bronchiole
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
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
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
BIO 233 FINAL EXAM NEWEST VERSION -2025/2026- 100+
QUESTIONS AND VERIFIED ANSWERS 100% CORRECT
GUARANTEED SUCCESS
There is no net air flow into or out of the lungs whena) P alveolus = P atmosphere
b) P alveolus< P atmosphere
c) P pleural wall > P atmosphere
d) P atmosphere< P pleural wall
a) P alveolus = P atmosphere
The upper respiratory tract differs from the lower respiratory tract in what way?
A) air is taken in through the lower respiratory tract, and CO2/O2 are exchanged in
the upper respiratory tract
b) air is taken in through the upper respiratory tract, and CO2/O2 are exchanged
in the lower respiratory tract
c) CO2 is removed from circulation in the upper respiratory tract
d) O2 is removed from circulation in the lower respiratory tract
B. Air is taken in through the upper respiratory tract, and CO2/O2 are exchanged
in the lower respiratory tract
Smooth muscle surrounds which structure of the lower respiratory tract?
a) Alveoli
b) Alveolar capillaries
c) Terminal bronchioles
d) Trachea
, 2
C. terminal bronchioles
In the alveolus, ____squamous epithelial cells are responsible for ___, while
___cells are responsible for ____.
a) Type 1; surfactant secretion; Type 2, gas exchange
b) type 1; debris removal; type 2; surfactant secretion
c) type 3; debris removal; type 1; gas exchange
d) type 1; gas exchange; type 2: surfactant secretion
d) type 1; gas exchange; type 2: surfactant secretion
What keeps the lungs from collapsing
Check the
b) trans pulmonary negative pressure caused by negative pressure from pleural
cavity
Identify the correct sequence of events for inspiration
a) diaphragm & inspiratory intercostals relax, lungs expand, air flows into alveoli
b) diaphragm & inspiratory intercostals contract; lungs expand, air flows out of the
alveoli
c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into
alveoli
d)diaphragm & expiratory intercostals relax, lungs contract, air flows out of alveoli
c) diaphragm & inspiratory intercostals contract, lungs expand, air flows into
alveoli
the main determiners of lung compliance are
a) lung tissue thickness, surface tension of fluid on the inner lung surface
b) lung tissue perforations, surface tension of fluid on the inner lung surface
c) lung tissue surface area, surface tension of fluid on the inner lung surface
, 3
d) lung tissue thickness, surface tension of fluid on the outer lung surface
a) lung tissue thickness, surface tension of fluid on the inner lung surface
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
d) none of the above
trained athletes tend to have
a) increased lung compliance
b) normal lung compliance
c) decreased lung compliance
d) asthma
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
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
, 4
b) trachea
c) bronchus
d)respiratory bronchiole
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
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
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
