27. What is the primary function of osteoclasts in bone remodeling? A. Bone formation B. Bone resorption C. Calcium storage D. Hematopoiesis E development 28. Which body region is located between the ribs and pelvis in the posterior aspect A. Sacral Region B. Lumbar Region C. Thoracic Region D. Cervical Region E. Gluteal Region 29. Which of the membranes lines body cavities that open to the exterior? A. Synovial Membranes B. Serous Membranes C. Mucous Membranes D. Cutaneous Membranes E. Fibrous Membranes 30. The process of bone formation within a cartilage model is known as: A. Intramembranous Ossification B Ossification B. Endochondra Ossification D Ossification E. Epiphyseal Ossification 31. Which bone cell type is derived from mesenchymal stem cells and initiates bone formation? A. Osteocytes B. Osteoblasts C. Osteoclasts D. Chondrocytes E Fibroblasts 32. What is the primary function of the hyoid bone? A. Protecting the spinal cord B. Supporting the tongue C. Forming part of the thoracic cage D. Articulating with the mandible E. Anchoring the vocal cords

27. B. Bone resorption<br /><br />Osteoclasts are specialized cells involved in the breakdown and resorption of bone tissue. They play a crucial role in bone remodeling by dissolving the mineralized matrix of bone, allowing for the removal of old or damaged bone tissue. This process is essential for the maintenance, repair, and remodeling of bones.<br /><br />28. B. Lumbar Region<br /><br />The lumbar region is located between the ribs and pelvis in the posterior aspect of the body. It refers to the lower part of the spine, which is situated in the lower back area.<br /><br />29. C. Mucous Membranes<br /><br />Mucous membranes line body cavities that open to the exterior, such as the respiratory, digestive, and urogenital tracts. They produce mucus, which helps to protect and lubricate the lining of these cavities.<br /><br />30. C. Endochondral Ossification<br /><br />Endochondral ossification is the process of bone formation within a cartilage model. It involves the replacement of cartilage with bone tissue, and it is responsible for the formation of most bones in the body, including long bones like the femur and humerus.<br /><br />31. B. Osteoblasts<br /><br />Osteoblasts are bone-forming cells derived from mesenchymal stem cells. They are responsible for initiating bone formation by producing and secreting the bone matrix, which eventually mineralizes to form bone tissue.<br /><br />32. E. Anchoring the vocal cords<br /><br />The hyoid bone is a small, U-shaped bone located in the neck. Its primary function is to anchor the vocal cords, which are essential for speech and sound production. The hyoid bone provides support and protection for the vocal cords and is connected to them through a series of muscles and ligaments.