#1
Which type of cell is primarily responsible for bone formation?
Osteoblast
ExplanationOsteoblasts are bone-forming cells responsible for synthesizing and depositing bone matrix.
#2
What is the main component of the extracellular matrix in bone?
Collagen
ExplanationCollagen provides structural support and flexibility to bone tissue.
#3
Which type of bone tissue provides strength and rigidity to bones?
Compact bone
ExplanationCompact bone is dense bone tissue that provides strength and rigidity to bones.
#4
Which hormone plays a crucial role in regulating calcium levels and bone metabolism?
Parathyroid hormone
ExplanationParathyroid hormone regulates calcium levels by stimulating bone resorption and increasing calcium absorption in the intestines.
#5
What is the process by which cartilage is replaced by bone during development or healing?
Ossification
ExplanationOssification is the process of bone formation where cartilage is replaced by bone tissue.
#6
Which vitamin is essential for the absorption of calcium in the intestines?
Vitamin D
ExplanationVitamin D is crucial for calcium absorption in the intestines, promoting bone health.
#7
Which of the following factors is NOT involved in the regulation of bone remodeling?
Calcitonin
ExplanationCalcitonin is not involved in bone resorption but rather regulates calcium levels by inhibiting osteoclast activity.
#8
Which bone cell type is responsible for sensing mechanical stress and orchestrating bone remodeling?
Osteocyte
ExplanationOsteocytes are bone cells that detect mechanical stress and regulate bone remodeling.
#9
Which of the following is NOT a function of bones?
Conduction of nerve impulses
ExplanationBones do not conduct nerve impulses but rather provide support, protection, and assistance in movement.