Question

42 it is possible to determine if a childs long bone is growing by examining a radiograph of the
a diaphysis
b articular cartilage
c epiphyseal plate
d medullary cavity

Explanation:

The epiphyseal plate (growth plate) is a hyaline cartilage plate in the metaphysis at each end of a long bone. It is responsible for the longitudinal growth of long bones. In a radiograph, if the epiphyseal plate is present (not yet ossified), it indicates that the bone is still growing. The diaphysis is the shaft of the long bone, articular cartilage covers the ends of bones at joints, and the medullary cavity is the central cavity of bone shafts where marrow is stored. None of these (diaphysis, articular cartilage, medullary cavity) are directly related to the growth determination of a long bone like the epiphyseal plate.

Answer:

C. Epiphyseal plate