Adrenal Cortex Gland.

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Presentation transcript:

Adrenal Cortex Gland

FIGURE 10.6 The two lobes of the pituitary gland and the hormones they secrete

FIGURE 10.17 Location and structure of an adrenal gland

Adrenal Cortex: Secretion of Cortisol Mediated through hypothalamus (CRH) and pituitary hormone (ACTH) See feedback workshop Stress is a major stimulus for cortisol release

Adrenal Cortex: Action of Cortisol Synthetic (drug) version: Prednisone Catabolic/starvation-like effects on metabolism Bkdn proteins and fat; converts them to glucose Suppresses Immune System Anti-inflammatory effects (helps with stress?)

Behavioral Effects Cortisol reduces Social anxiety Phobias Cortisol alters mood

Adrenal Glands: Cortex Adrenal cortex Mineralocorticoids: aldosterone Homeostasis of Na+, K+, water, blood pressure

Effect of Stress on Adrenal Gland

Glucocorticoids (e.g., cortisol) (Choose all that are correct) Are secreted from the adrenal cortex Are secreted in response to stress Have anti-inflammatory activity

Disorders of the Adrenal Glands Addison’s Disease: cortisol deficiency Failure of adrenal cortex JF Kennedy Cushing’s Syndrome: excessive secretion of glucocorticoids (cortisol) Excessive glucose prodn. from protein Salt and water retention

Cushing’s Syndrome Deposition of Abdominal Fat Connective Tissue Inhibition of collagen formation leads to stretch marks on skin (striae), and rupturing of small blood vessels (bruising)

Symptoms of Hypercortisolism (Cushing’s)

Hypercortisolism, a.k.a Cushing’s Disease Can also result from prescription use of glucocorticoids Prednisone Used to treat asthma, rheumatoid arthritis, lupus (autoimmune disease), inflammatory diseases, immunosuppression after organ transplantation

FIGURE 10.18 Cushing's syndrome. Prolonged exposure to cortisol causes fluid to accumulate in the face. Most often, Cushing's syndrome is caused by the administration of cortisol for allergies or inflammation.

Before and After

Cushing’s Syndrome Before Cushing’s During the disease

Buffalo Hump Caused by unique fat deposition patterns of excessive glucocorticoids

Before and After

Before and After

Hypercortisolism Jerry Lewis - Before and after taking glucocorticoids (prednisone) for an autoimmune disorder

True/False Excess glucocorticoids can cause abnormal deposition of fat tissue

Glucocorticoid hormones (e.g., cortisol): A. Have anti-inflammatory effects B. Are secreted during and provide resistance to stress C. Have catabolic/starvation like effects on the body D. Are secreted by the adrenal cortex