Which cell type, in its most active form, has an elongated, polarized morphologic appearance and a basophilic cytoplasm?
a. Chondrocyte
b. Osteoblast
c. Osteoclast
d. Osteocyte
e. Periosteal fibroblast
ANS: B
Active osteoblasts line up along the surface of the bone, with their apical cytoplasms filled with basophilic rough endoplasmic reticulum that is required for the synthesis of type I collagen and other bone proteins. Chondrocytes have a nonpolarized, spherical morphology.
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