Briefly describe the processes by which bone increases in length and diameter
What will be an ideal response
The only means by which bone can increase in length (interstitial growth) is by activity at the epiphyseal plate. Until full height is reached, the plate consists of layers of chondrocytes, which generate matrix that is then calcified and replaced by bone matrix secreted by osteoblasts on the diaphyseal side of the plate. Around ages 18-20 the cartilage is replaced completely by bone and no more lengthwise growth can occur. Bone increases in diameter via appositional growth as new bone matrix is laid down by osteoblasts in the periosteum.
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The primary target organ of aldosterone is _________.
A) the liver B) the pancreas C) the kidney D) all of the above
Summarize the function of vascular anastomoses
What will be an ideal response?
Name the proteins that make up a thick filament
A) actin and nebulin B) myosin and nebulin C) actin and titin D) myosin and titin E) actin and dystrophin
Which of the following best describes the cerebral arterial circle (circle of Willis)?
A) A short anastomosis found in the cerebellum B) An anastomosis surrounding the pituitary gland C) Formed by the superior and inferior sagittal sinuses D) An anastomosis circling the entire cortex E) A portal system connecting the hypothalamus with the anterior pituitary