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2. THE ADRENAL GLANDS

4. CORTICOSTERIODS – group of hormones secreted by the adrenal cortex. These are synthesized from the steroid Cholesterol . The following are the ADRENOCORTICAL HORMONES: 1. Mineralocorticoids – affect electrolytes of the ECF – Sodium and Potassium 2. Glucocorticoids – Exhibit an important effect in increasing blood glucose concentration 3. Androgenic hormones ALDOSTERONE – principal mineralocorticoid CORTISOL – principal glucocorticoid

5. LAYERS OF ADRENAL CORTEX AND SECRETION

6. 1. Zona Glomerulosa - constitutes about 15% of the adrenal cortex - cells are the only ones secreting Aldosterone - they contain enzyne aldosterone synthase necessary for synthesis of aldosterone - secretion is controlled by ECF conc. of Angiotensin II and Potassium

12. The Intense Glucocorticoid Activity of Dexamethasone, has almost zero mineralocorticoid activity, thus is important drug for stimulating specific glucocorticoid activity

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