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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热门试题

单项选择题Seminiferous tubules contain all of the following components EXCEPT

A．Sertoli cells
B．Spermatocytes
C．A fibrous connective tissue tunic
D．Skeletal muscle in their tunica propria
E．A germinal epithelium

单项选择题All of the following cell types are found in the brain EXCEPT

A．Purkinje cells
B．Stellate cells
C．Schwann cells
D．Small granule cells
E．Pyramidal cells

单项选择题A nephron includes all of the following components EXCEPT

A．A renal corpuscle
B．A distal convoluted tubule
C．A thin limb of the loop of Henle
D．A collecting tubule
E．Pars recta of the proximal tubule

单项选择题Renal filtration barrier consists of all of the following components EXCEPT

A．The fenestrated endothelium of the glomerular capillaries
B．The basal lamina
C．The filtration slits with diaphragms between pedicels
D．Medullary rays
E．Renal capsule

单项选择题Which of the following statements about Langerhans’ cells is TRUE

A．They commonly are found in the dermis
B．They function as sensory mechanoreceptors
C．They function as receptors for cold
D．They play an immunologic role in the skin
E． They are of epithelial origin