H1 A&P Intro Microanatomy of Bone BFHS

Front

What hormone is released when blood calcium levels rise above homeostatic levels?

Back

Calcitonin is released to lower blood calcium levels.

Front

What is an osteon?

Back

An osteon is the basic structural unit of compact bone, consisting of a central canal surrounded by concentric rings of bone matrix.

Front

What is the effect of stress on the skeleton?

Back

Stress on the skeleton causes bone growth, as bones adapt to the loads they bear.

Front

What are osteoclasts?

Back

Osteoclasts are large multi-nucleated cells responsible for the resorption (breakdown) of bone tissue.

Front

What is the process of continuous breakdown and reforming of bone tissue called?

Back

The process is called remodeling.

Front

What role do osteoblasts play in bone tissue?

Back

Osteoblasts are responsible for the formation of new bone tissue.

Front

What is the function of osteocytes?

Back

Osteocytes maintain bone tissue and communicate with other bone cells.

Front

What is the significance of calcium in bone health?

Back

Calcium is essential for maintaining bone density and strength.

Front

How does parathyroid hormone (PTH) affect blood calcium levels?

Back

PTH increases blood calcium levels by stimulating bone resorption and increasing calcium reabsorption in the kidneys.

Front

What is the difference between compact bone and spongy bone?

Back

Compact bone is dense and forms the outer layer of bones, while spongy bone is lighter and found inside bones, containing red marrow.