BIO 235 FINAL EXAM WITH CORRECT
QUESTIONS AND ANSWERS 2025
Venous blood returning from systemic circulation first enters the ___,
proceeds to the ____, loses ___and gains ____ in the lungs, and then returns to
the heart via the ____.
a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins.
b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta
c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins
d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta - CORRECT-
ANSWERS>>A. Right atrium, right ventricle, pulmonary artery, CO2, O2,
pulmonary veins
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 - CORRECT-
ANSWERS>>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 - CORRECT-ANSWERS>>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 - CORRECT-
ANSWERS>>d) type 1; gas exchange; type 2: surfactant secretion
There is no net air flow into or out of the lungs when
a) P alveolus = P atmostpher
b) P alveolus< P atmostphere
c) P pleural wall > P atmostphere
d) P atmosphere< P pleural wall - CORRECT-ANSWERS>>a) P alveolus = P
atmosphere
What keeps the lungs from collapsing
Check the - CORRECT-ANSWERS>>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 - CORRECT-ANSWERS>>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
d) lung tissue thickness, surface tension of fluid on the outer lung surface -
CORRECT-ANSWERS>>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 - CORRECT-ANSWERS>>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-ANSWERS>>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-ANSWERS>>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-ANSWERS>>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
QUESTIONS AND ANSWERS 2025
Venous blood returning from systemic circulation first enters the ___,
proceeds to the ____, loses ___and gains ____ in the lungs, and then returns to
the heart via the ____.
a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary veins.
b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta
c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary veins
d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta - CORRECT-
ANSWERS>>A. Right atrium, right ventricle, pulmonary artery, CO2, O2,
pulmonary veins
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 - CORRECT-
ANSWERS>>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 - CORRECT-ANSWERS>>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 - CORRECT-
ANSWERS>>d) type 1; gas exchange; type 2: surfactant secretion
There is no net air flow into or out of the lungs when
a) P alveolus = P atmostpher
b) P alveolus< P atmostphere
c) P pleural wall > P atmostphere
d) P atmosphere< P pleural wall - CORRECT-ANSWERS>>a) P alveolus = P
atmosphere
What keeps the lungs from collapsing
Check the - CORRECT-ANSWERS>>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 - CORRECT-ANSWERS>>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
d) lung tissue thickness, surface tension of fluid on the outer lung surface -
CORRECT-ANSWERS>>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 - CORRECT-ANSWERS>>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-ANSWERS>>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-ANSWERS>>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-ANSWERS>>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
