Endocrine System. A. Introduction 1. endocrine organs - hypophysis, thyroid gland, adrenal gland, parathyroid gland, pineal gland. 3. Typical secretions: hormones which affect distant targets and/or many tissues
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
1. endocrine organs -
hypophysis, thyroid gland, adrenal gland,
parathyroid gland, pineal gland
a. peptide hormones - proteins, glycoproteins, or peptides which bind to receptors on cell surfaces; work via second messengers, water soluble; e.g. insulin, glucagon, follicle stimulating hormone
b. steroid hormones - lipid soluble and bind to intracellular targets, e.g. to DNA or hormone receptors; derived from cholesterol, e.g. progesterone, estradiol, testosterone
c. amino acid derived hormones - water soluble, catecholamines, thyroxin and epinephrine
with primary capillary
Divided into 3 visibly different zones, all of which are steroid-secreting and all of which synthesize hormones from cholesterol, but in different regions different types of hormones are produced.
a. zona glomerulosa
outermost layer, cells look clustered
Secretes mineralocorticoids (e.g. aldosterone, which is involved in salt balance via the kidney), and deoxycorticosterone.
Secretion is stimulated by angiotensin II from juxtaglomerular apparatus and ACTH from hypophysis.
cells (virtually every cell)