Which zone is Hypertrophic Zone?

Which zone is Hypertrophic Zone?

• A. Resting Zone
• B. Proliferation Zone
• C. Hypertrophic Zone
• D. Ossification Zone

Answer: (C)

The main idea here is recognizing the zone of the growth plate where chondrocytes actually enlarge, or undergo hypertrophy, during endochondral ossification. In the growth plate, you have distinct zones: resting (reserve) chondrocytes, proliferating chondrocytes that form columns, the hypertrophic zone where cells enlarge and prepare the matrix for calcification, and the ossification zone where cartilage is replaced by bone. The hypertrophic zone is defined by the enlargement of chondrocytes and the beginning of matrix calcification, which sets up the next step where blood vessels invade and bone-forming cells replace the cartilage. So, the zone described by hypertrophy of the cells is the hypertrophic zone, the stage immediately preceding ossification.

The main idea here is recognizing the zone of the growth plate where chondrocytes actually enlarge, or undergo hypertrophy, during endochondral ossification. In the growth plate, you have distinct zones: resting (reserve) chondrocytes, proliferating chondrocytes that form columns, the hypertrophic zone where cells enlarge and prepare the matrix for calcification, and the ossification zone where cartilage is replaced by bone. The hypertrophic zone is defined by the enlargement of chondrocytes and the beginning of matrix calcification, which sets up the next step where blood vessels invade and bone-forming cells replace the cartilage. So, the zone described by hypertrophy of the cells is the hypertrophic zone, the stage immediately preceding ossification.