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Human Endocrine Physiology February 27, 2014.

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Presentation on theme: "Human Endocrine Physiology February 27, 2014."— Presentation transcript:

1 Human Endocrine Physiology February 27, 2014

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6 Sex Determination and Differentiation

7 SRY

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10 AMH T

11 SRY Gene

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13 Testicular Steroid Pathways Progesterone Pregnenolone Cholesterol 17OH-Prog 17OH-Preg T A4 LH/FSH

14 Conversion of Testosterone to Dihydrotestosterone

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17 SRY AMH T

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22 Conversion of Testosterone to Dihydrotestosterone

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25 Adrenal Steroid Pathways Progesterone Pregnenolone Cholesterol Cortisol 17OH-Prog 17OH-PregDHEA Testosterone Androstenedione Aldosterone ACTH

26 Classical Congenital Adrenal Hyperplasia Progesterone Pregnenolone Cholesterol Cortisol 17OH-Prog 17OH-PregDHEA Testosterone Androstenedione Aldosterone ACTH * *21-hydroxylase loss of function mutation *

27 Classical Congenital Adrenal Hyperplasia Progesterone Pregnenolone Cholesterol Cortisol 17OH-Prog 17OH-Preg DHEA Testosterone Androstenedione Aldosterone ACTH * *21-hydroxylase loss of function mutation *

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29 Human Endocrine Physiology: The Menstrual Cycle

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34 Ovarian Physiology GnRH Pituitary Ovary LH FSH Inhibin Estrogens Progesterone Androgens

35 FSH Sex steroid Inhibin* + Gonadotropin Releasing Hormone (GnRH) + (pituitary) (hypothalamus) (ovary) LH - (+) *Inhibin exerts negative feedback only at the pituitary and only on FSH

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40 Insulin

41 Ovarian Steroid Pathways Progesterone Pregnenolone Cholesterol 17OH-Prog 17OH-Preg T A4 LH/FSH Estrone Estradiol

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43 *Only enzyme to know **

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45 Changes in Hormones Across the Menstrual Cycle 0 Ov30 FSH

46 Changes in Hormones Across the Menstrual Cycle 0 Ov30 Estradiol

47 Changes in Hormones Across the Menstrual Cycle 0 Ov30 LH

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49 Changes in Hormones Across the Menstrual Cycle 0 Ov30 Progesterone

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53 Inhibin * * *LH receptors on granulosa cells induced by FSH

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55 Changes in Hormones Across the Menstrual Cycle 0 Ov30 Inhibin

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57 * * *LH receptors on granulosa cells induced by FSH

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64 Functions of FSH During the Menstrual Cycle

65 Functions of LH During the Menstrual Cycle

66 Functions of Estradiol During the Menstrual Cycle

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69 Functions of Progesterone During the Menstrual Cycle

70 Functions of Inhibin During the Menstrual Cycle

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72 Changes in Hormones Across the Menstrual Cycle 0 Ov30


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