What is the diaphysis of a long bone?Multiple choice question.Growth plateCentral shaftFat-storing bone marrowEnds with spongy bone

Identifying the Correct Option

1. Understand the Question: The question asks for the definition or identification of the "diaphysis" in the context of a long bone.
2. Define Key Terms:
   • Diaphysis: The diaphysis is the long, tubular shaft of a long bone.
   • Growth Plate: Also known as the epiphyseal plate, this is the area of growth in a long bone and is not the diaphysis.
   • Fat-storing bone marrow: While bone marrow can be found within the diaphysis, it is not synonymous with the diaphysis itself.
   • Ends with spongy bone: The ends of long bones contain spongy bone, known as the epiphysis, which is distinct from the diaphysis.

Analyzing Choices

1. Growth Plate: Incorrect, as this is the site of bone growth, not the shaft.
2. Central Shaft: Correct, as this is the definition of diaphysis.
3. Fat-storing bone marrow: Incorrect, as the diaphysis may contain yellow marrow but is not defined by it.
4. Ends with spongy bone: Incorrect, as the ends of long bones are different from the diaphysis.

Final Answer

The correct answer is Central shaft.