PORTAGE LEARNING
PATHOPHYSIOLOGY EXAM
5
60+ (Updated for 2026) Exam Prep
Pack | A+ Questions & Verified Answers
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This Exam contains: Portage Learning
✓ Pathophysiology Exam 5
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Trusted by thousands of students and professionals worldwide Page 1 of 18
,Question 1
Expiration is an active process, whereas inspiration is largely passive?
Correct Answer
false
Rationale:
The statement is incorrect because expiration is also largely a passive process, as it involves the elastic recoil of the lungs and the
airways, rather than an active process requiring muscle contraction. The primary active process involved in breathing is inspiration,
which requires the contraction of the diaphragm and intercostal muscles to expand the lungs and draw air in.
Question 2
Both carbon dioxide and oxygen are able to bind with hemoglobin?
Correct Answer
true
Rationale:
Carbon dioxide binds to hemoglobin through a process called carbaminohemoglobin formation, where carbon dioxide combines with
the amino groups of the hemoglobin molecule. Oxygen also competes with carbon dioxide for these binding sites, but hemoglobin's
affinity for oxygen is greater than its affinity for carbon dioxide, allowing it to release oxygen to tissues while binding carbon dioxide
for transport.
Question 3
The rate of perfusion must exceed the rate of ventilation in order to ensure adequate oxygenation of the blood?
Correct Answer
false
Rationale:
The rate of perfusion refers to the flow of blood through the body's blood vessels, while the rate of ventilation refers to the exchange
of oxygen and carbon dioxide through the lungs. In reality, the rate of perfusion typically exceeds the rate of ventilation, allowing the
lungs to extract oxygen from the blood, not the other way around, making the statement false.
Question 4
Because of its strategic location the larynx can be characterized as the "watchdog of the lungs"?
Correct Answer
true
Rationale:
The correct answer is "true" because the larynx, or voice box, plays a crucial role in protecting the lungs by acting as a protective
barrier, preventing particles and substances from entering the airways and potentially causing damage. This function serves as a
safeguard, or "watchdog," ensuring the lungs remain healthy and functioning properly.
Trusted by thousands of students and professionals worldwide Page 2 of 18
, Question 5
Exercise, allergens, and emotion can all contribute to an asthma attack?
Correct Answer
true
Rationale:
Exercise can trigger asthma attacks by causing rapid breathing, which can lead to inflammation in the airways, and allergens such as
pollen or dust mites can also irritate airways, causing constriction and inflammation. Emotions like stress or anxiety can also stimulate
the body's "fight or flight" response, leading to increased adrenaline levels that can trigger asthma symptoms.
Question 6
Nearly all pulmonary emboli are thrombi arising from deep vein thrombosis in the upper and lower extremities?
Correct Answer
false
Rationale:
Pulmonary emboli can be caused by various sources, including arterial thrombi, paradoxical emboli from the right heart, and even air
or fat, in addition to deep vein thrombi from the upper and lower extremities. Therefore, stating that "nearly all" pulmonary emboli are
caused by deep vein thrombi from the upper and lower extremities is an overstatement, making the answer "false" correct.
Question 7
Hypoventilation is associated with decreased PCO2?
Correct Answer
false
Rationale:
Hypoventilation leads to inadequate removal of carbon dioxide from the lungs, resulting in an increase in arterial PCO2 levels, not a
decrease. This is because the body's natural response to hypoventilation is to retain more CO2, which triggers an increase in
ventilation as a compensatory mechanism to decrease PCO2 levels.
Question 8
Even after forced expiration,
a significant amount of air
remains in the lungs?
Correct Answer
true
Rationale:
When air is forced out of the lungs during expiration, the alveoli, which are the small air sacs responsible for gas exchange, are not
completely cleared of air, allowing some residual volume to remain. This residual volume is necessary to prevent the collapse of the
lung tissue and maintain its shape, making it impossible to completely expel all air from the lungs.
Trusted by thousands of students and professionals worldwide Page 3 of 18
PATHOPHYSIOLOGY EXAM
5
60+ (Updated for 2026) Exam Prep
Pack | A+ Questions & Verified Answers
100% Guarantee Pass
This Exam contains: Portage Learning
✓ Pathophysiology Exam 5
✓ 100% Accurate Questions and Answers
✓ 100% Guarantee Pass - Verified by Experts
✓ Each Question Includes The Correct Answer
✓ Expert-Verified
Trusted by thousands of students and professionals worldwide Page 1 of 18
,Question 1
Expiration is an active process, whereas inspiration is largely passive?
Correct Answer
false
Rationale:
The statement is incorrect because expiration is also largely a passive process, as it involves the elastic recoil of the lungs and the
airways, rather than an active process requiring muscle contraction. The primary active process involved in breathing is inspiration,
which requires the contraction of the diaphragm and intercostal muscles to expand the lungs and draw air in.
Question 2
Both carbon dioxide and oxygen are able to bind with hemoglobin?
Correct Answer
true
Rationale:
Carbon dioxide binds to hemoglobin through a process called carbaminohemoglobin formation, where carbon dioxide combines with
the amino groups of the hemoglobin molecule. Oxygen also competes with carbon dioxide for these binding sites, but hemoglobin's
affinity for oxygen is greater than its affinity for carbon dioxide, allowing it to release oxygen to tissues while binding carbon dioxide
for transport.
Question 3
The rate of perfusion must exceed the rate of ventilation in order to ensure adequate oxygenation of the blood?
Correct Answer
false
Rationale:
The rate of perfusion refers to the flow of blood through the body's blood vessels, while the rate of ventilation refers to the exchange
of oxygen and carbon dioxide through the lungs. In reality, the rate of perfusion typically exceeds the rate of ventilation, allowing the
lungs to extract oxygen from the blood, not the other way around, making the statement false.
Question 4
Because of its strategic location the larynx can be characterized as the "watchdog of the lungs"?
Correct Answer
true
Rationale:
The correct answer is "true" because the larynx, or voice box, plays a crucial role in protecting the lungs by acting as a protective
barrier, preventing particles and substances from entering the airways and potentially causing damage. This function serves as a
safeguard, or "watchdog," ensuring the lungs remain healthy and functioning properly.
Trusted by thousands of students and professionals worldwide Page 2 of 18
, Question 5
Exercise, allergens, and emotion can all contribute to an asthma attack?
Correct Answer
true
Rationale:
Exercise can trigger asthma attacks by causing rapid breathing, which can lead to inflammation in the airways, and allergens such as
pollen or dust mites can also irritate airways, causing constriction and inflammation. Emotions like stress or anxiety can also stimulate
the body's "fight or flight" response, leading to increased adrenaline levels that can trigger asthma symptoms.
Question 6
Nearly all pulmonary emboli are thrombi arising from deep vein thrombosis in the upper and lower extremities?
Correct Answer
false
Rationale:
Pulmonary emboli can be caused by various sources, including arterial thrombi, paradoxical emboli from the right heart, and even air
or fat, in addition to deep vein thrombi from the upper and lower extremities. Therefore, stating that "nearly all" pulmonary emboli are
caused by deep vein thrombi from the upper and lower extremities is an overstatement, making the answer "false" correct.
Question 7
Hypoventilation is associated with decreased PCO2?
Correct Answer
false
Rationale:
Hypoventilation leads to inadequate removal of carbon dioxide from the lungs, resulting in an increase in arterial PCO2 levels, not a
decrease. This is because the body's natural response to hypoventilation is to retain more CO2, which triggers an increase in
ventilation as a compensatory mechanism to decrease PCO2 levels.
Question 8
Even after forced expiration,
a significant amount of air
remains in the lungs?
Correct Answer
true
Rationale:
When air is forced out of the lungs during expiration, the alveoli, which are the small air sacs responsible for gas exchange, are not
completely cleared of air, allowing some residual volume to remain. This residual volume is necessary to prevent the collapse of the
lung tissue and maintain its shape, making it impossible to completely expel all air from the lungs.
Trusted by thousands of students and professionals worldwide Page 3 of 18
