,Inside you will get:
➢ Updated 2 Version Exam + Study Guide
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Expert-Verified Explanations
Table of Contents
BIOD 331 MODULE 5 EXAM VERSION 1 ..................................................... 2
BIOD 331 MODULE 5 EXAM VERSION 2 ................................................... 37
BIOD 331 MODULE 5 EXAM STUDY GUIDE .............................................. 57
BIOD 331 MODULE 5 EXAM VERSION 1
### Question 1
Expiration is an active process, whereas inspiration is largely passive.
Answer: False
Verified Explanation:
,Inspiration is primarily an active process requiring contraction of the
diaphragm and external intercostal muscles to expand the thoracic cavity,
lowering intrathoracic pressure and drawing air into the lungs. Expiration,
at rest, is typically passive and occurs due to elastic recoil of the lungs
and relaxation of inspiratory muscles. Expiratory muscles (e.g., internal
intercostals, abdominal muscles) are recruited to actively force air out
only during forced expiration, such as during vigorous exercise or certain
pathological states.
---
### Question 2
Both carbon dioxide and oxygen are able to bind with hemoglobin.
Answer: True
Verified Explanation:
Hemoglobin, the primary oxygen-carrying protein in red blood cells, binds
oxygen (O₂) at its heme group; it also binds carbon dioxide (CO₂) at a
separate site—the globin chains—forming carbaminohemoglobin. While O₂
binds reversibly for transport from lungs to tissues, CO₂ binding facilitates
its removal from tissues to lungs for exhalation.
---
### Question 3
, The rate of perfusion must exceed the rate of ventilation in order to
ensure adequate oxygenation of the blood.
Answer: False
Verified Explanation:
Optimal gas exchange requires a balance between alveolar ventilation
(airflow, V) and pulmonary perfusion (blood flow, Q), known as the V/Q
ratio. Adequate oxygenation is achieved when ventilation and perfusion
are well matched, ideally at a ratio of about 0.8. Excess perfusion
relative to ventilation (V/Q <1) leads to hypoxemia due to poorly
oxygenated blood, whereas excess ventilation over perfusion (V/Q >1)
causes wasted ventilation.
---
### Question 4
Because of its strategic location, the larynx can be characterized as
the "watchdog of the lungs."
Answer: True
Verified Explanation:
The larynx is anatomically situated at the opening to the lower
respiratory tract and serves as a critical defense mechanism against
aspiration. Its reflex closure during swallowing protects the airway; its
sensitivity to irritants evokes coughing, thus “watchdog” metaphorically
underscores its role in airway protection.
➢ Updated 2 Version Exam + Study Guide
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Expert-Verified Explanations
Table of Contents
BIOD 331 MODULE 5 EXAM VERSION 1 ..................................................... 2
BIOD 331 MODULE 5 EXAM VERSION 2 ................................................... 37
BIOD 331 MODULE 5 EXAM STUDY GUIDE .............................................. 57
BIOD 331 MODULE 5 EXAM VERSION 1
### Question 1
Expiration is an active process, whereas inspiration is largely passive.
Answer: False
Verified Explanation:
,Inspiration is primarily an active process requiring contraction of the
diaphragm and external intercostal muscles to expand the thoracic cavity,
lowering intrathoracic pressure and drawing air into the lungs. Expiration,
at rest, is typically passive and occurs due to elastic recoil of the lungs
and relaxation of inspiratory muscles. Expiratory muscles (e.g., internal
intercostals, abdominal muscles) are recruited to actively force air out
only during forced expiration, such as during vigorous exercise or certain
pathological states.
---
### Question 2
Both carbon dioxide and oxygen are able to bind with hemoglobin.
Answer: True
Verified Explanation:
Hemoglobin, the primary oxygen-carrying protein in red blood cells, binds
oxygen (O₂) at its heme group; it also binds carbon dioxide (CO₂) at a
separate site—the globin chains—forming carbaminohemoglobin. While O₂
binds reversibly for transport from lungs to tissues, CO₂ binding facilitates
its removal from tissues to lungs for exhalation.
---
### Question 3
, The rate of perfusion must exceed the rate of ventilation in order to
ensure adequate oxygenation of the blood.
Answer: False
Verified Explanation:
Optimal gas exchange requires a balance between alveolar ventilation
(airflow, V) and pulmonary perfusion (blood flow, Q), known as the V/Q
ratio. Adequate oxygenation is achieved when ventilation and perfusion
are well matched, ideally at a ratio of about 0.8. Excess perfusion
relative to ventilation (V/Q <1) leads to hypoxemia due to poorly
oxygenated blood, whereas excess ventilation over perfusion (V/Q >1)
causes wasted ventilation.
---
### Question 4
Because of its strategic location, the larynx can be characterized as
the "watchdog of the lungs."
Answer: True
Verified Explanation:
The larynx is anatomically situated at the opening to the lower
respiratory tract and serves as a critical defense mechanism against
aspiration. Its reflex closure during swallowing protects the airway; its
sensitivity to irritants evokes coughing, thus “watchdog” metaphorically
underscores its role in airway protection.
