lecture20 - Hormone In humans an intercellular messenger...

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Hormones Hormones Hormone: Hormone: In humans, an intercellular messenger produced in the ductless glands of the endocrine system transported from the site of synthesis to the site(s) of action by the bloodstream Types include: steroids , such as estrogens and androgens polypeptides such as insulin and glucagon amino acid derivatives such as epinephrine Roles include: maintenance of homeostasis (normal cellular functions) regulation of growth and development
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Endocrine cells secrete hormones into the bloodstream They signal cells to respond to changes in their environment.
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Selected Human Hormones Selected Human Hormones Corticotropin-releasing factor (CRF) Hypothalamus + ACTH Gonadotropin-releasing factor GnRF Hypothalamus + FSH and LH Thyrotropin-releasing factor (TRF) Hypothalamus + TSH Growth hormone- releasing factor (GRF) Hypothalamus + GH Adrenocorticotropic hormone (ACTH) Anterior pituitary + adrenocorticoids Polypeptides Source Effects Thyrotropin (TSH) Anterior pituitary + thyroxine Follicle-stimulating hormone (FSH) Anterior pituitary +ovulation, estrogen + spermatogenesis Hormone
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Selected Human Hormones Selected Human Hormones Source Effects Luteinizing hormone (LH) Anterior pituitary + estrogen, progesterone,     androgens Met-enkephalin Anterior pituitary + opoid effects Leu-enkephalin Anterior pituitary + opoid effects Hormone Vasopressin Posterior pituitary + H 2 O resorption, + blood pressure Oxytocin Posterior pituitary + uterine contraction, + flow of milk Insulin Pancreas + glucose uptake    from bloodstream Glucagon Pancreas + glucose release    to bloodstream Polypeptides (cont'd) β-Ενδορπηιν Αντεριορπιτυιταρψ +οποιδεφφεχτσ
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Selected Human Hormones Selected Human Hormones Source Effects Hormone Steroids Glucorticoids Adrenal cortex - inflammation,  + stress resistance Mineralocorticoids Adrenal cortex maintain salt and water balance Estrogens Gonads and adrenal cortex + secondary sex  characteristics Androgens Gonads and adrenal cortex
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lecture20 - Hormone In humans an intercellular messenger...

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