What is the role of surfactant in the lungs?
Answer and explanation
Correct answer: A. It lowers surface tension so the alveoli do not collapse
- Step 1: Alveoli are lined with a thin film of water. Step 2. Surfactant reduces its surface tension. Answer: it keeps the alveoli open. Why not the others: these tasks belong to haemoglobin, immune cells and cilia.
Practise more Biology and Physiology.
Free questions with an explanation for every one, and full timed TMS (Test für Medizinische Studiengänge) practice mock tests.