A 48-Year-Old Man Comes to the Office for an Initial

question 367

Multiple Choice

A 48-year-old man comes to the office for an initial visit.  He says that he feels well and has no medical problems.  The patient has a 20-pack-year smoking history and does not use alcohol or illicit drugs.  He is counseled on smoking cessation.  To explain how smoking affects lung function, the patient is shown a graph of the expected change in forced expiratory volume in 1 second (FEV1) over time if he continues to smoke at the same rate (curve D in image) .  Which of the following curves most likely demonstrates the expected FEV1 over time if this patient were to stop smoking now?

• A)A
• B)B
• C)C
• D)D

---

Definitions:

Pharynx

A muscular tube that connects the mouth and nasal passages with the esophagus and larynx, serving both the respiratory and digestive systems.

Large Intestine

The last part of the digestive system, responsible for water absorption and the formation of feces.

Vitamin K

Vitamin K is a fat-soluble vitamin essential for the production of blood clotting factors and responsible for regulating bone metabolism.

Large Intestine

The final section of the digestive system, where water is absorbed and stool is formed from indigestible food matter.