This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following is not associated with mucous secretion? 
Select and explain. 
A. Paneth cell, B. Goblet cell, C. Brunner's glands, D. Crypts of Lieberkuhn
A: Paneth cell
Answer: A: Paneth cell 
Explanation: Panthet cells are not associated with mucous secretion, it secretes lysozyme and also has some phagocytic functions. Goblet cells are specialized mucus secreting cells present throughout the intestine. Brunners glands are found in the submucosa of small intestine, they produce viscid, mucoid, alkaline secretion which neutralize acid chyme. Crypts of Lieberkuhn secretes mucus, electrolytes and water.