Question

which type of cell is the principal cell of connective tissues and produces the fibers found in nearly all connective tissues?

a.) fibroblast

b.) macrophage

c.) lymphocyte

d.) leukocyte

Explanation:

Fibroblasts are the principal cells of connective tissues. They secrete the extracellular matrix and collagen, which are the fibers found in nearly all connective tissues. Macrophages are part of the immune system, lymphocytes are a type of white blood cell involved in immunity, and leukocytes (white blood cells) also play roles in the immune response. None of these other cell types are primarily responsible for producing the fibers in connective tissues like fibroblasts are.

Answer:

A. Fibroblast