This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System Pa 1, Subject name: Physiology
Surfactant is secreted by which of the following: 
Select and explain. 
A. Type I pneumocyte, B. Type II pneumocyte, C. Seoli cell, D. Leydig cell
B: Type II pneumocyte
Answer: B: Type II pneumocyte 
Explanation: Type I pneumocyte: Involved in gas exchange makes up 80-90% of alveolar cells. Type II pneumocyte: Secrete surfactant makes up 5-10 % area alveolar cells. Seoli cell: Present in seminiferous tubules, responsible for nourishment spermatozoa during spermatogenesis, has FSH receptors & secrete inhibin. Leydig cell: Produces testosterone in response to LH.