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theca |
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theca [′thē·kə] (anatomy) The sheath of dura mater which covers the spinal cord. (botany) A moss capsule. A pollen sac. (histology) The layer of stroma surrounding a Graafian follicle. (invertebrate zoology) The test of a testate protozoan or a rotifer. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Insulin stimulates testosterone biosynthesis by human thecal cells from women with polycystic ovary syndrome by activating its own receptor and using inositolglycan mediators as the signal transduction system. Progesterone is then converted to androstenedione by the actions of the 17[alpha]-hydroxylase and 17,20-lyase enzyme complex, which is present in thecal cells but not in granulosa cells. |
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