Question

which of the following cells produces collagen?
○ macrophages
○ lymphocytes
○ adipocytes
○ mast cells
○ fibroblasts

Explanation:

Macrophages are for phagocytosis, lymphocytes for immune response, adipocytes store fat, mast cells release histamine. Fibroblasts synthesize collagen (and extracellular matrix components).

Answer:

fibroblasts (the option with "fibroblasts" as the cell type)