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7 Cards in this Set
- Front
- Back
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______ cells are under FSH control in the male
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-sertoli
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_____ cells have tight junctions
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-sertoli
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What do Sertoli cells secrete (3)
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-ABP (androgen binding protein)- binds testosterone to keep concentration high in tubules
-inhibin - neg-feedback for FSH -seminiferous tubule fluid |
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Sertoli cells: functions (4)
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-form blood-testes barrier
-phagocytize excess cytoplasm and defective germ cells -secrete seminiferous tubule fluid to flush out sperm -secrete ABP |
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LH acts on _______ cells. These cells produce ______
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-Leydig cells
-testosterone |
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LH and FSH are stimulated by what hypothalamic hormone
why are they not always paralleled? |
- gonadotropin-releasing hormone (GnRH)
- b/c FSH is also under control of inhibin, (and LH->testosterone) |
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How does testosterone inhibit _____?
consequence |
-GnRH
-by acting on the hypothalamus, :.both LH and FSH are decreased -ALSO, reduces LH secrotory cells/ responsiveness to GnRH :. has greater effect on LH secretion |
