What is the primary function of the epiphyseal plate in long bones?
Solution
Correct Answer: Option A
The primary function of the epiphyseal plate, also known as the growth plate, in long bones is bone lengthening. This region is composed of hyaline cartilage and is located between the epiphysis and diaphysis of growing bones. During childhood and adolescence, the epiphyseal plate is the site where new cartilage is continuously produced and then gradually ossified, allowing the bone to elongate. This process is essential for longitudinal bone growth until the plate eventually ossifies and becomes an epiphyseal line, signaling the end of lengthening.
Other options like calcium storage and fat storage are functions of different parts of the bone — calcium storage occurs mainly in the bone matrix, and fat storage happens in the yellow bone marrow. Bone remodeling is a lifelong process involving the resorption and formation of bone tissue but is not the specific function of the epiphyseal plate.
In summary:
- The epiphyseal plate is responsible for longitudinal growth of bones.
- It consists of cartilage that is gradually replaced by bone, facilitating bone lengthening.
- Growth ceases when the epiphyseal plate ossifies in adulthood.
Reference: Gray's Anatomy, 41st Edition, Volume 2, Chapter 5 / Page 120
Other options like calcium storage and fat storage are functions of different parts of the bone — calcium storage occurs mainly in the bone matrix, and fat storage happens in the yellow bone marrow. Bone remodeling is a lifelong process involving the resorption and formation of bone tissue but is not the specific function of the epiphyseal plate.
In summary:
- The epiphyseal plate is responsible for longitudinal growth of bones.
- It consists of cartilage that is gradually replaced by bone, facilitating bone lengthening.
- Growth ceases when the epiphyseal plate ossifies in adulthood.
Reference: Gray's Anatomy, 41st Edition, Volume 2, Chapter 5 / Page 120
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions