Bio 235 Final Exam 2024/2025 Exam
Questions Marking Scheme New Update
| A+ Rated
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 -
🧠ANSWER ✔✔A. Right atrium, right ventricle, pulmonary artery, CO2, O2,
pulmonary veins
The upper respiratory tract differs from the lower respiratory tract in what
way?
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,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 - 🧠ANSWER
✔✔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 - 🧠ANSWER ✔✔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
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,c) type 3; debris removal; type 1; gas exchange
d) type 1; gas exchange; type 2: surfactant secretion - 🧠ANSWER ✔✔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 - 🧠ANSWER ✔✔a) P alveolus = P
atmosphere
What keeps the lungs from collapsing
Check the - 🧠ANSWER ✔✔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
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, 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 - 🧠ANSWER ✔✔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 -
🧠ANSWER ✔✔a) lung tissue thickness, surface tension of fluid on the
inner lung surface
lung compliance is defined as
a) lung volume/ transpulmonary pressure
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STATEMENT. ALL RIGHTS RESERVED
Questions Marking Scheme New Update
| A+ Rated
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 -
🧠ANSWER ✔✔A. Right atrium, right ventricle, pulmonary artery, CO2, O2,
pulmonary veins
The upper respiratory tract differs from the lower respiratory tract in what
way?
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
,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 - 🧠ANSWER
✔✔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 - 🧠ANSWER ✔✔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
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,c) type 3; debris removal; type 1; gas exchange
d) type 1; gas exchange; type 2: surfactant secretion - 🧠ANSWER ✔✔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 - 🧠ANSWER ✔✔a) P alveolus = P
atmosphere
What keeps the lungs from collapsing
Check the - 🧠ANSWER ✔✔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
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STATEMENT. ALL RIGHTS RESERVED
, 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 - 🧠ANSWER ✔✔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 -
🧠ANSWER ✔✔a) lung tissue thickness, surface tension of fluid on the
inner lung surface
lung compliance is defined as
a) lung volume/ transpulmonary pressure
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STATEMENT. ALL RIGHTS RESERVED
