National Dental Assisting Examining Board (NDAEB) Practice Exam

What is the role of trabeculae in bone structure?

1. Produce blood cells

2. Support hormone production

3. Forms structures for bone marrow

4. Store fat

The correct answer is: Forms structures for bone marrow

Trabeculae refer to the small, rod-like or plate-like structures that make up the spongy tissue found in certain types of bone, commonly known as cancellous or trabecular bone. Their primary role is to form a mesh-like network that provides structural support and helps to define the spaces within which bone marrow is located. This is significant because bone marrow is essential for producing blood cells through a process called hematopoiesis. In addition to providing support, the arrangement of trabeculae optimizes the weight-to-strength ratio of bones, allowing them to be both sturdy and lightweight, which is vital for various functions, including mobility and protection of vital organs. Therefore, the correct choice emphasizes how trabeculae are integral in forming the structures that house bone marrow, facilitating the essential functions of blood cell production.