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      • The blood supply to the testes is mainly from the [...] arteries.
      • testicular
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      • The capillary network around the testes drains into the venous [...] plexus.
      • pampiniform
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      • The pampiniform venous plexus of the testes drains into the [...] veins.
      • internal spermatic
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      • Which 2 hormones trigger the synthesis of androgen-binding proteins by Sertoli cells in the testes?
      • FSH and testosterone
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      • Which hormone do Leydig cells mainly produce in the testes?
      • Testosterone
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      • Testosterone is produced by [...] cells in the testes.
      • Leydig
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      • In the testes, which 2 weak androgens do Leydig cells secrete?
      • Androstenedione and DHEA
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      • What is the immediate precursor for testosterone?
      • Androstenedione
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      • What are the 2 plasma proteins which bind testosterone?
      • Sex hormone-binding globulin and albumin
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      • [...] from the anterior pituitary stimulates Sertoli cells in the testes.
      • FSH
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      • [...] from the anterior pituitary stimulates Leydig cells in the testes.
      • LH
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      • FSH from the anterior pituitary stimulates [...] cells in the testes.
      • Sertoli
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      • LH from the anterior pituitary stimulates [...] cells in the testes.
      • Leydig
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      • Inhibin is produced by [...] cells in the testes.
      • Sertoli
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      • Inhibin is secreted by the testes and [...]-regulates the production of FSH from the anterior pituitary.
      • down
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      • Testosterone [...]-regulates the release of GnRH from the hypothalamus.
      • down
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      • Testosterone is secreted from the testes and [...]-regulates the release of LH from the anterior pituitary and GnRH from the hypothalamus.
      • down
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      • What effect does PRL have on Leydig cell activity in the testes?
      • Stimulation
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      • What effect does inhibin have on Leydig cell activity in the testes?
      • Stimulation
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      • Testosterone is secreted from the testes and down-regulates the release of [...] from the anterior pituitary and [...] from the hypothalamus.
      • LH, GnRH
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      • Inhibin is secreted by the testes and down-regulates the production of [...] from the anterior pituitary.
      • FSH
      • -
      • [...] is secreted by the testes and down-regulates the production of FSH from the anterior pituitary.
      • Inhibin
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      • [...] is secreted from the testes and down-regulates the release of LH from the anterior pituitary and GnRH from the hypothalamus.
      • Testosterone
      • -
      • How does the regulation of PRL secretion differ from that of other hormones secreted by the anterior pituitary?
      • PRL secretion is tonically suppressed by dopamine so a disturbance in the hypothalamus-pituitary axis leads to increased levels
      • -
      • Testicular fluid is secreted by [...] cells.
      • Sertoli
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      • Andrestenedione is secreted by [...] cells in the testes.
      • Leydig
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      • Oestrogen is secreted by [...] cells in the testes.
      • Leydig
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      • Do androgens circulate in the blood in free form or in bound form?
      • Bound (mostly)
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      • The α subunit of hCG is similar to that of which 3 hormones?
      • LH
        FSH
        TSH
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      • The [cells] of the placenta convert DHEA from the adrenal glands to oestrogens.
      • syncytiotrophoblasts
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      • The syncytiotrophoblasts of the placenta convert [...] from the adrenal glands to oestrogens.
      • DHEA
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      • The syncytiotrophoblasts of the placenta convert DHEA from the adrenal glands to [...].
      • oestrogens
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      • The hormone DHT is mostly produced in the [...].
      • testes
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      • Testosterone is mostly produced in the [...].
      • testes
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      • Androstenedione is mostly produced in the [...].
      • adrenal glands
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      • In [...] cells in the [...] and in [...] tissue, aromatase converts testosterone and androstenedione into oestrogen.
      • Sertoli, testes, adipose
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      • In Sertoli cells in the testes and in adipose tissue, [enzyme] converts testosterone and androstenedione into oestrogen.
      • aromatase
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      • In Sertoli cells in the testes and in adipose tissue, aromatase converts [...] and [...] into oestrogen.
      • testosterone, androstenedione
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      • In Sertoli cells in the testes and in adipose tissue, aromatase converts testosterone and androstenedione into [...].
      • oestrogen
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      • During development, [hormone] directs the differentiation of the penis, scrotum, and prostate.
      • DHT
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      • During adulthood, [hormone] is responsible for prostate growth, balding, and sebaceous gland activity.
      • DHT
      • -
      • During development, [hormone] is responsible for the differentiation of the epididymis, vas deferens, and seminal vesicles.
      • testosterone
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      • During adolescence, [hormone] is responsible for the growth spurt, deepening of the voice, closing of epiphyseal plates, and increased libido.
      • testosterone
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      • What are the 3 major androgens from most to least potent?
      • DHT
        Testosterone
        Androstenedione
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