,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.
