BIOS 256 Week 7 Quiz Exam 1 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the respiratory system?
A. Circulate blood
B. Exchange gases
C. Digest nutrients
D. Regulate hormones
Correct Answer: B
Rationale: The respiratory system facilitates gas exchange,
supplying oxygen and removing carbon dioxide.
2. Which structure is the site of gas exchange in the lungs?
A. Bronchi
B. Alveoli
C. Trachea
D. Larynx
Correct Answer: B
Rationale: Alveoli are tiny sacs where oxygen and carbon dioxide
diffuse between air and blood.
,3. Which muscle is the primary muscle of inspiration?
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Rectus abdominis
Correct Answer: A
Rationale: The diaphragm contracts and flattens, increasing
thoracic volume to draw air in.
4. Which structure prevents food from entering the trachea?
A. Epiglottis
B. Glottis
C. Larynx
D. Pharynx
Correct Answer: A
Rationale: The epiglottis covers the trachea during swallowing to
prevent aspiration.
5. Which structure connects the larynx to the bronchi?
A. Pharynx
B. Trachea
C. Esophagus
D. Alveolus
Correct Answer: B
,Rationale: The trachea (windpipe) carries air from the larynx to the
bronchi.
6. Which structure is the voice box?
A. Pharynx
B. Larynx
C. Trachea
D. Bronchi
Correct Answer: B
Rationale: The larynx contains vocal cords and produces sound.
7. Which type of epithelial cells line the alveoli?
A. Ciliated columnar
B. Squamous
C. Cuboidal
D. Stratified
Correct Answer: B
Rationale: Simple squamous epithelium allows efficient gas
diffusion.
8. Which gas binds to hemoglobin in red blood cells?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Carbon monoxide
, Correct Answer: B
Rationale: Oxygen binds to hemoglobin for transport to tissues.
9. Which gas is a waste product of cellular metabolism?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Correct Answer: B
Rationale: CO₂ is produced by cells and expelled via the respiratory
system.
10. Which process moves air into the lungs?
A. Expiration
B. Inspiration
C. Diffusion
D. Filtration
Correct Answer: B
Rationale: Inspiration draws air into the lungs by increasing
thoracic volume.
11. Which process moves air out of the lungs?
A. Expiration
B. Inspiration
C. Diffusion
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the respiratory system?
A. Circulate blood
B. Exchange gases
C. Digest nutrients
D. Regulate hormones
Correct Answer: B
Rationale: The respiratory system facilitates gas exchange,
supplying oxygen and removing carbon dioxide.
2. Which structure is the site of gas exchange in the lungs?
A. Bronchi
B. Alveoli
C. Trachea
D. Larynx
Correct Answer: B
Rationale: Alveoli are tiny sacs where oxygen and carbon dioxide
diffuse between air and blood.
,3. Which muscle is the primary muscle of inspiration?
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Rectus abdominis
Correct Answer: A
Rationale: The diaphragm contracts and flattens, increasing
thoracic volume to draw air in.
4. Which structure prevents food from entering the trachea?
A. Epiglottis
B. Glottis
C. Larynx
D. Pharynx
Correct Answer: A
Rationale: The epiglottis covers the trachea during swallowing to
prevent aspiration.
5. Which structure connects the larynx to the bronchi?
A. Pharynx
B. Trachea
C. Esophagus
D. Alveolus
Correct Answer: B
,Rationale: The trachea (windpipe) carries air from the larynx to the
bronchi.
6. Which structure is the voice box?
A. Pharynx
B. Larynx
C. Trachea
D. Bronchi
Correct Answer: B
Rationale: The larynx contains vocal cords and produces sound.
7. Which type of epithelial cells line the alveoli?
A. Ciliated columnar
B. Squamous
C. Cuboidal
D. Stratified
Correct Answer: B
Rationale: Simple squamous epithelium allows efficient gas
diffusion.
8. Which gas binds to hemoglobin in red blood cells?
A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Carbon monoxide
, Correct Answer: B
Rationale: Oxygen binds to hemoglobin for transport to tissues.
9. Which gas is a waste product of cellular metabolism?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
Correct Answer: B
Rationale: CO₂ is produced by cells and expelled via the respiratory
system.
10. Which process moves air into the lungs?
A. Expiration
B. Inspiration
C. Diffusion
D. Filtration
Correct Answer: B
Rationale: Inspiration draws air into the lungs by increasing
thoracic volume.
11. Which process moves air out of the lungs?
A. Expiration
B. Inspiration
C. Diffusion
