University of MarylandBIOE 340Lecture 26 Notes

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BIOE 340 – Lecture 26 Notes Today, we discuss general principles of endocrinology and revisit ligand-receptor binding interactions. Endocrine Physiology The endocrine system is a collection of gl... ands that secrete hormones, which are chemicals that act as physiological regulators (we have already discussed several of these, including ADH and insulin). Hormones can act in paracrine, autocrine, or endocrine fashion. Endocrine organs/glands - Pituitary - Hypothalamus - Thyroid - Parathyroid - Adrenal - Pancreas (islets) - Gonads (testes, ovaries) - Placenta Classes of Hormones - Proteins/polypeptides: insulin, ADH - Steroids: estrogen, testosterone - Modified amino acids o Catecholamines – secreted from adrenal medulla: epinephrine, norepinephrine, dopamine o Thyroid hormones – secreted by thyroid: triiodothyronine (T3), thyroxine (T4) [Show More]

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