17 Questions
Which hormone is responsible for lowering blood Ca levels by inhibiting osteoclast activity?
Calcitonin
What type of fracture involves an exposed bone and intact skin?
Open
During the inflammatory stage of bone healing, what is formed at the fracture site?
Hematoma
Which type of fracture is characterized by a twisting injury?
Spiral
What is the critical physiological regulator of many processes including muscle contraction?
Calcium
Which stage of bone healing involves the formation of a callus and new blood vessels?
Reparative stage
What is the function of osteoclasts in bone physiology?
Reabsorption of bone
Which cells are responsible for depositing new bone material during bone remodeling?
Osteoblasts
What is the process that involves the formation of bone within mesenchyme?
Intramembranous ossification
What hormone is secreted from C cells in the thyroid gland for calcium ion regulation?
Calcitonin
What is the main function of calcitonin in bone physiology?
Inhibiting bone breakdown
Which cells are responsible for converting woven bone into lamellar bone during bone remodeling?
Osteoblasts
What is the key signal for the secretion of PTH?
Reduction of blood Ca levels
How does Calcitriol assist PTH in the kidney tubules?
By preventing Ca removal through urine
What is the main function of PTH in relation to bone reabsorption?
Increase osteoclast activity
Which organ is primarily responsible for Calcitriol activation?
Kidney
What happens to cartilaginous tissue to maintain blood Ca levels within homeostatic limits?
It becomes ossified and rebuilt
Explore the process of endochondral ossification where bone gradually replaces a cartilage model. Learn about the anatomy, physiology, and pathophysiology of the skeletal system including the roles of osteoblasts, osteocytes, and osteoclasts.
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