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Hormone Cycle, Drawing

Hormone Cycle, Drawing

C021/4232

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102.8 MB (3.9 MB compressed)

6614 x 5433 pixels

55.9 x 46.0 cm ⏐ 22.0 x 18.1 in (300dpi)

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Credit

JACOPIN / BSIP / SCIENCE PHOTO LIBRARY JACOPIN / BSIP / SCIENCE PHOTO LIBRARY

Caption

Illustration of male hormone control, a constant regulation. The hypothalamo-hypophyseal axis : the LHRH (or GnRH) gonadotropin-releasing hormone (GnRH) released in the hypothalamus causes the hypophyseal secretion of two gonadotropin hormones (LH and FSH). The gonadotropic axis : FSH and LH, in acting on the testicles, maintains a constant concentration of testosterone, and therefore male sexual characteristics. Testosterone in turn limits secretions of GnRH, FSH and LH. The adrenocortical, under the control of a hypophyseal hormone (ACTH), produces a group of hormones called corticosteroids which include sexual hormones (androgens) that discretely intervene in sexual development and reproduction, but can also play an important role during pathological.

Release details

Model release not required. Property release not required.

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