Question

the primary function of osteoblasts is to:
a lay down bone matrix
b inhibit the growth of bone
c resorb bone along the epiphyseal plate
d prevent osteocytes from forming
e stimulate bone growth

Explanation:

Osteoblasts are cells in the body that play a crucial role in bone formation. Their main job is to produce and secrete the bone matrix, which is the non - cellular part of bone. This matrix includes collagen fibers and other substances that provide the structural framework for bone.

• Option B: Inhibiting bone growth is not the function of osteoblasts. There are other regulatory mechanisms in the body for bone growth control, not osteoblasts.
• Option C: Resorbing bone is the function of osteoclasts, not osteoblasts. Osteoclasts break down bone tissue.
• Option D: Osteoblasts do not prevent osteocytes (mature bone cells) from forming. In fact, osteoblasts can differentiate into osteocytes.
• Option E: While osteoblasts are involved in bone growth as they build bone matrix, the more specific and primary function is laying down the bone matrix. Stimulating bone growth is a more general outcome that is a result of their matrix - laying function.

Answer:

A. lay down bone matrix