Question

Epiphyseal disks, which are present at the ends of long bones, are responsible for________________.
A. Bone elongation
B. Growth of thickness of the bone
C. Remodeling the shape of the bone
D. Formation of Haversian system

Answer 1

In most vertebrate animals, a bone is a hard tissue that forms part of the skeleton. Bones protect the body's different organs, generate red and white blood cells, store minerals, provide the body structure and support, and allow mobility. Bones have a complicated internal and exterior structure that comes in a range of forms and sizes. They're light but tough, and they're useful for a variety of things.

Complete answer:
The epiphyseal plate (also known as the epiphyseal plate, physis, or growth plate) is a hyaline cartilage plate found at each end of a long bone in the metaphysis. The growth plate is the portion of a long bone where new bone development occurs; the entire bone is alive, with maintenance remodeling occurring throughout its current bone tissue, but the growth plate is where the long bone gets longer (adds length).
Only children and adolescents have the plate; adults who have finished developing have an epiphyseal line instead of the plate. Epiphyseal closure or growth plate fusion is the term for this type of replacement. Complete fusion occurs on average between the ages of 15 and 20 for females (with 15–18 years being the most frequent) and 17 and 24 for boys (with 18–22 years being the most common).
So, ‘Long bones' lengthwise growth is controlled by the epiphyseal plate/disk. Long bones continue to grow by the addition of bone tissue at the epiphyseal plate, possibly until puberty.

Thus, the answer is option A: Bone elongation.

Note:
Osteochondrodysplasia is a group of growth diseases caused by defects in the formation and division of epiphyseal plates. Achondroplasia, or a deficiency in cartilage production, is the most frequent abnormality. Achondroplasia is the most frequent cause of dwarfism or low height, as well as widespread bone and joint abnormalities. Other kinds of osteochondrodysplasias, on the other hand, might cause low stature and widespread abnormalities of the bones and joints owing to aberrant growth plate cartilage cell activity.