Question

Epiphyseal plates at the extremities of long bones help in
A. Bone moulding
B. Elongation of bone
C. Bone formation
D. Formation of Haversian canal

Answer 1

Hint: At the end of the long bones hyaline cartilage, called epiphyseal plate is present. The epiphyseal plate is found only in children and adolescents.

Step by step answer:Human body comprises five types of bones: long, short, flat, irregular, and sesamoid. Long bones are the one which are longer than they are being wider. For example, the femur and tibia are the bones which undergo a lot of activities in a day. They grow longitudinally by increasing the length of the diaphysis. Hyaline cartilage called epiphyseal plate is present at the end of each bone which is responsible for the elongation of bone. The epiphyseal plate is located between diaphysis and epiphysis. Elongation of bone occurs during growth periods. A hormone called growth hormone stimulates the growth in bones which is secreted by the anterior lobe of the pituitary gland.
Haversian canal is found in cortical bones and its function is to provide oxygen and nutrients to the bones thus making it strong. Bone moulding takes place in the foetus head where its bone can come close together or overlap which helps it to fit through the pelvis.
So, from the above description option B is the correct answer.

Note: The epiphyseal plate is found only in children and adolescents. In adults, after the growing stage is stopped, the epiphyseal plate is replaced by the epiphyseal line. This replacement is called epiphyseal closure or growth plate fusion. Epiphyseal closure occurs commonly at the age of 15-16 years for girls and for boys it is 18-19 years.