BIOS 256 Anatomy & Physiology IV
Exam 4 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A - Chamberlain
1. The main function of the respiratory system is to:
A. Facilitate gas exchange
B. Pump blood
C. Digest nutrients
D. Filter toxins
Correct Answer: A. Facilitate gas exchange
Rationale: Provides oxygen to blood and removes carbon dioxide.
2. The site of gas exchange in the lungs is the:
A. Alveoli
B. Bronchi
C. Trachea
D. Larynx
Correct Answer: A. Alveoli
Rationale: Thin-walled sacs that allow diffusion of O₂ and CO₂.
,3. The structure that prevents food from entering the trachea is
the:
A. Epiglottis
B. Uvula
C. Larynx
D. Pharynx
Correct Answer: A. Epiglottis
Rationale: Folds over the glottis during swallowing.
4. The cartilage that forms the anterior “Adam’s apple” is the:
A. Thyroid cartilage
B. Cricoid cartilage
C. Arytenoid cartilage
D. Epiglottis
Correct Answer: A. Thyroid cartilage
Rationale: Largest laryngeal cartilage; protects vocal cords.
5. The windpipe is also called the:
A. Trachea
B. Bronchus
C. Pharynx
D. Larynx
Correct Answer: A. Trachea
Rationale: Connects larynx to bronchi and conducts air to lungs.
,6. The primary muscle of respiration is the:
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Pectoralis minor
Correct Answer: A. Diaphragm
Rationale: Contracts to expand thoracic cavity during inhalation.
7. External respiration refers to:
A. Gas exchange between lungs and blood
B. Gas exchange between tissues and blood
C. Cellular metabolism
D. Oxygen transport only
Correct Answer: A. Gas exchange between lungs and blood
Rationale: Occurs in alveoli.
8. Internal respiration refers to:
A. Gas exchange between blood and tissues
B. Gas exchange between lungs and blood
C. Cellular oxygen consumption
D. CO₂ production only
Correct Answer: A. Gas exchange between blood and tissues
Rationale: Oxygen diffuses from blood into tissues; CO₂ diffuses
from tissues into blood.
, 9. Hemoglobin binds oxygen in the:
A. Red blood cells
B. Plasma
C. White blood cells
D. Platelets
Correct Answer: A. Red blood cells
Rationale: Hemoglobin carries oxygen to tissues.
10. Oxygen is transported in blood primarily as:
A. Bound to hemoglobin
B. Dissolved in plasma
C. As bicarbonate
D. Bound to albumin
Correct Answer: A. Bound to hemoglobin
Rationale: About 98% of oxygen is carried this way.
11. Carbon dioxide is transported in blood mainly as:
A. Bicarbonate ions
B. Dissolved CO₂
C. Bound to hemoglobin
D. Bound to plasma proteins
Correct Answer: A. Bicarbonate ions
Rationale: CO₂ reacts with water forming HCO₃⁻ for transport.
Exam 4 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A - Chamberlain
1. The main function of the respiratory system is to:
A. Facilitate gas exchange
B. Pump blood
C. Digest nutrients
D. Filter toxins
Correct Answer: A. Facilitate gas exchange
Rationale: Provides oxygen to blood and removes carbon dioxide.
2. The site of gas exchange in the lungs is the:
A. Alveoli
B. Bronchi
C. Trachea
D. Larynx
Correct Answer: A. Alveoli
Rationale: Thin-walled sacs that allow diffusion of O₂ and CO₂.
,3. The structure that prevents food from entering the trachea is
the:
A. Epiglottis
B. Uvula
C. Larynx
D. Pharynx
Correct Answer: A. Epiglottis
Rationale: Folds over the glottis during swallowing.
4. The cartilage that forms the anterior “Adam’s apple” is the:
A. Thyroid cartilage
B. Cricoid cartilage
C. Arytenoid cartilage
D. Epiglottis
Correct Answer: A. Thyroid cartilage
Rationale: Largest laryngeal cartilage; protects vocal cords.
5. The windpipe is also called the:
A. Trachea
B. Bronchus
C. Pharynx
D. Larynx
Correct Answer: A. Trachea
Rationale: Connects larynx to bronchi and conducts air to lungs.
,6. The primary muscle of respiration is the:
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Pectoralis minor
Correct Answer: A. Diaphragm
Rationale: Contracts to expand thoracic cavity during inhalation.
7. External respiration refers to:
A. Gas exchange between lungs and blood
B. Gas exchange between tissues and blood
C. Cellular metabolism
D. Oxygen transport only
Correct Answer: A. Gas exchange between lungs and blood
Rationale: Occurs in alveoli.
8. Internal respiration refers to:
A. Gas exchange between blood and tissues
B. Gas exchange between lungs and blood
C. Cellular oxygen consumption
D. CO₂ production only
Correct Answer: A. Gas exchange between blood and tissues
Rationale: Oxygen diffuses from blood into tissues; CO₂ diffuses
from tissues into blood.
, 9. Hemoglobin binds oxygen in the:
A. Red blood cells
B. Plasma
C. White blood cells
D. Platelets
Correct Answer: A. Red blood cells
Rationale: Hemoglobin carries oxygen to tissues.
10. Oxygen is transported in blood primarily as:
A. Bound to hemoglobin
B. Dissolved in plasma
C. As bicarbonate
D. Bound to albumin
Correct Answer: A. Bound to hemoglobin
Rationale: About 98% of oxygen is carried this way.
11. Carbon dioxide is transported in blood mainly as:
A. Bicarbonate ions
B. Dissolved CO₂
C. Bound to hemoglobin
D. Bound to plasma proteins
Correct Answer: A. Bicarbonate ions
Rationale: CO₂ reacts with water forming HCO₃⁻ for transport.
