单项选择题

A．T memory cells B．B memory cells C．T helper cells D．Pl……

Circulating antibodies are synthesized and secreted by which of the following cells

A．T memory cells
B．B memory cells
C．T helper cells
D．Plasma cells
E．T cytotoxic cells

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热门试题

单项选择题Which of the following statements concerning liver sinusoids is TRUE

A． They are continuous with bile canaliculi
B．They are surrounded by a well developed basal lamina
C．They are lined by nonfenestrated endothelial cells
D．They deliver blood to the central vein
E．They deliver blood to portal vein

单项选择题Which of the following statements concerning the pancreas is FALSE

A． It possesses islets of Langerhans
B．It possess serous demilunes
C．It contains more beta cells than alpha cells
D．It exhibits large, electron-lucent granules in its S cells.
E．Its acinar cells contain a round nucleus

单项选择题All of the following material can be absorbed directly by the surface absorptive cell of the intestines EXCEPT

A．water
B．monosaccharide
C．free fatty acids
D．ions
E．small peptides

单项选择题Which of the following cell types is present in the gastric glands of the pyloric stomach

A．Goblet cells
B．Mucous neck cells
C．Paneth cells
D．Basal cells
E．Chief cells

单项选择题Which one of the following statements regarding cartilage is FALSE

A．Its growth rate is increased by testosterone and thyroxine
B．Its growth rate is decreased by cortisone and estradiol
C．Fibrocartilage is the cartilage model in endochondral bone formation
D．The matrix of elastic cartilage is identical to that of hyaline cartilage except that it contains elastic fibers
E．Hyaline cartilage is the cartilage model associated with endochondral bone formation.