BIO 253
Final | Comprehensive Practice Questions with Answers &
Detailed Explanations
This Exam Includes
• BIO 253 Final Exam preparation
Practice questions
Correct answers
Detailed explanations
Key biology concepts
, BIO 253 Final | Comprehensive Practice
Questions with Answers & Detailed
Explanations
Q1. Which structures make up the upper respiratory system?
A) Trachea, bronchi, lungs
B) Nose, larynx, pharynx
C) Alveoli, diaphragm, pleura
D) Bronchioles, alveoli, capillaries
Answer: B
Rationale: The upper respiratory system includes the nose, larynx,
and pharynx. The lower respiratory system includes the trachea,
bronchi, and lungs.
Q2. Which structures make up the lower respiratory system?
A) Nose, larynx, pharynx
B) Trachea, bronchi, lungs
C) Mouth, nose, sinuses
D) Lungs, diaphragm, ribs
Answer: B
Rationale: The lower respiratory system consists of the trachea,
bronchi, and lungs.
,Q3. What is the function of the epiglottis?
A) Produces sound
B) Stops food from entering the lungs
C) Warms and moistens air
D) Exchanges gases
Answer: B
Rationale: The epiglottis is part of the larynx and prevents food
from getting into the lungs during swallowing.
Q4. What is the amount of air breathed in and out during
normal respiration?
A) Residual volume
B) Tidal volume
C) Vital capacity
D) Inspiratory reserve volume
Answer: B
Rationale: Tidal volume (TV) is the amount of air inhaled or
exhaled during normal, quiet respiration.
Q5. What is the largest respiratory volume?
A) Tidal volume
B) Expiratory reserve volume
, C) Inspiratory reserve volume
D) Residual volume
Answer: C
Rationale: Inspiratory reserve volume is the largest respiratory
volume; it is the extra air that can be inhaled after a normal
inhalation.
Q6. What molecule is able to bind to both O₂ and CO₂?
A) Plasma
B) Hemoglobin
C) Surfactant
D) Albumin
Answer: B
Rationale: Hemoglobin binds oxygen and also carries carbon
dioxide.
Q7. What happens when CO₂ in hemoglobin is high?
A) O₂ is high
Final | Comprehensive Practice Questions with Answers &
Detailed Explanations
This Exam Includes
• BIO 253 Final Exam preparation
Practice questions
Correct answers
Detailed explanations
Key biology concepts
, BIO 253 Final | Comprehensive Practice
Questions with Answers & Detailed
Explanations
Q1. Which structures make up the upper respiratory system?
A) Trachea, bronchi, lungs
B) Nose, larynx, pharynx
C) Alveoli, diaphragm, pleura
D) Bronchioles, alveoli, capillaries
Answer: B
Rationale: The upper respiratory system includes the nose, larynx,
and pharynx. The lower respiratory system includes the trachea,
bronchi, and lungs.
Q2. Which structures make up the lower respiratory system?
A) Nose, larynx, pharynx
B) Trachea, bronchi, lungs
C) Mouth, nose, sinuses
D) Lungs, diaphragm, ribs
Answer: B
Rationale: The lower respiratory system consists of the trachea,
bronchi, and lungs.
,Q3. What is the function of the epiglottis?
A) Produces sound
B) Stops food from entering the lungs
C) Warms and moistens air
D) Exchanges gases
Answer: B
Rationale: The epiglottis is part of the larynx and prevents food
from getting into the lungs during swallowing.
Q4. What is the amount of air breathed in and out during
normal respiration?
A) Residual volume
B) Tidal volume
C) Vital capacity
D) Inspiratory reserve volume
Answer: B
Rationale: Tidal volume (TV) is the amount of air inhaled or
exhaled during normal, quiet respiration.
Q5. What is the largest respiratory volume?
A) Tidal volume
B) Expiratory reserve volume
, C) Inspiratory reserve volume
D) Residual volume
Answer: C
Rationale: Inspiratory reserve volume is the largest respiratory
volume; it is the extra air that can be inhaled after a normal
inhalation.
Q6. What molecule is able to bind to both O₂ and CO₂?
A) Plasma
B) Hemoglobin
C) Surfactant
D) Albumin
Answer: B
Rationale: Hemoglobin binds oxygen and also carries carbon
dioxide.
Q7. What happens when CO₂ in hemoglobin is high?
A) O₂ is high
