The repeated units of compact bone are called:
a. osteons
b. lacunae
c. trabeculae
d. canaliculi
Answer: a. osteons
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A. natural killer cells. B. cytotoxic T-lymphocytes. C. helper T-lymphocytes. D. CD8+ B-lymphocytes.
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A) have a great deal of rough endoplasmic reticulum reflecting the fact that they secrete a tremendous amount of protein (antibody) B) are small so that they slip between endothelial cells of capillaries to fight infection in the surrounding tissues C) have a great deal of rough endoplasmic reticulum to dispose of ingested pathogens D) are large so that they can envelope their prey by phagocytosis
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A) extrinsic clotting mechanism. B) intrinsic clotting mechanism. C) intravascular clotting. D) the Hageman factor.
The nasal cavity is separated from the oral cavity by ________
A) the pharynx B) the nasal conchae C) the larynx D) both the hard and soft palate E) both the nasal conchae and hard palate