Question

Intramembranous ossification

A) Explains how a juvenile's bone can grow in length.
B) Produces flat bones, as in the bones of the roof of the skull.
C) Occurs in the diaphysis of a long bone.
D) Occurs in all bones before birth.

Answer 1

Option B) Produces flat bones, as in the bones of the roof of the skull, accurately describes intramembranous ossification, which forms flat bones like those in the skull and begins in utero, continuing into adolescence.

Step-by-step explanation:

Intramembranous ossification is the bone development process from fibrous membranes and is responsible for forming certain types of bones. Specifically, Option B) Produces flat bones, as in the bones of the roof of the skull is accurate, as it is involved in the formation of flat bones such as those in the skull, the mandible, and the clavicles. This process begins as mesenchymal cells cluster together and differentiate into osteoblasts, which start to secrete the extracellular matrix and deposit calcium ions. This results in the hardening of this matrix and eventually leads to the development of spongy bone that will later be remodeled into compact bone. It's important to note that intramembranous ossification starts during fetal development and continues into adolescence, allowing the skull and clavicles to deform during childbirth and the flat bones of the face to reach their adult size at the end of an adolescent's growth spurt.