Cells that reside in a specific connective tissue type for an extended period of time are called
A. transitional cells.
B. stem cells.
C. fixed cells.
D. wandering cells.
Answer: C
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Hard masses composed of cholesterol and calcium carbonate called ________ can obstruct the bile ducts and cause excruciating pain.
Fill in the blank(s) with the appropriate word(s).
As blood flows away from the heart, how does overall blood pressure in vessels change? Why?
A. Blood pressure decreases, because of the effects of friction between the vessel walls and the moving blood. B. Blood pressure increases. Otherwise the blood would not flow up toward the heart. C. Blood pressure increases, because vessel diameter narrows with distance from the heart, which increases the force on the blood. D. Blood pressure decreases, because blood vessels are passive and cannot exert any force on the moving blood.
What is the role of vitamin A in bone deposition?
A. It provides the raw material for calcification of the ground substance. B. It promotes the cross-linking of collagen molecules. C. It is necessary for calcium absorption by the small intestine. D. It promotes the synthesis of bone matrix glycosaminoglycans (GAGs). E. It stimulates osteoblast activity.
Dilation of the afferent arteriole would increase glomerular pressure.
Answer the following statement true (T) or false (F)