Bones store energy as lipids in __________.

• A. the matrix of bone tissue
• B. spongy bone
• C. red marrow
• D. yellow marrow
• E. the ground substance

Answer: (D)

Verified step by step guidance

1. Understand the function of yellow marrow: Yellow marrow is primarily involved in the storage of fats, which serve as an energy reserve for the body.
2. Differentiate between types of bone marrow: Red marrow is responsible for hematopoiesis (production of blood cells), while yellow marrow stores lipids.
3. Identify the location of yellow marrow: Yellow marrow is found in the medullary cavity of long bones, such as the femur and humerus.
4. Recognize the composition of yellow marrow: It consists mainly of adipocytes (fat cells) that store triglycerides, which can be converted into energy when needed.
5. Connect the concept to the problem: Given the options, yellow marrow is the correct answer as it is the site where bones store energy as lipids.