The structural and functional unit of the lungs is

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Microbial control reduces or eliminates microbes. 'Cultivation,' is correct as the exception, promoting growth, per microbiology (e.g., Brock). 'Disinfection,' kills on surfaces. 'Antisepsis,' reduces on living tissue. 'Sterilization,' eliminates all. Cultivation's opposition makes D the accurate answer.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: D

Rationale: Iatrogenic diseases result from medical intervention. 'Tuberculosis,' is correct as the exception, naturally infectious, per medicine (e.g., Harrison's). 'Drug-induced hepatitis,' (medication), 'Surgical site infection,' (surgery), and 'Radiation dermatitis,' (therapy) are iatrogenic. Tuberculosis' external origin makes D the accurate answer.