单项选择题

In which of the following sites do lymphocytes become immunocompetent

A．Germinal center of secondary lymphoid nodules
B．White pulp of the spleen
C．Thymus cortex
D．Red pulp of the spleen
E．Paracortex of lymph nodes
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单项选择题
Prolactin is synthesized and secreted by which of the following cells
A．Acidophils in the pars distails
B．Basophils in the pars tuberalis
C．Somatotrophs in the pars distalis
D．Basophils in the pars intermedia
E．Chief cell
单项选择题
Which of the following statements concerning secondary ovarian follicles is TRUE
A．They lack liquor folliculi
B．They contain a secondary oocyte
C．Their continued maturation requires FSH
D．They lack a theca externa
E．They have a single layer of cuboidal follicular cells surrounding the oocyte
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