Adrenal gland II - Non ACTH mediated hormones

7 important questions on Adrenal gland II - Non ACTH mediated hormones

What are the non ACTH mediated hormones?

- Aldosterone from zona glomerulosa
- Catecholamines (epinephrine) from medulla

What is the effect of aldosterone in kidneys?

Increases blood volume and pressure by increasing Na+ reabsorption and therefore water reabsorption in tubule

What are the effects of epinephrine in the body?

- Liver: gluconeogenesis
- Adipose: lipolysis
- Heart: increased contractility, stroke volume, cardiac output, blood pressure
- Muscle: muscle contraction
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What are hormones that increase blood volume?

1. Aldosterone
2. Antidiuretic hormone (ADH)

What are hormones that decrease blood volume?

1. Atrial natriuretic peptide (ANP)

What are the effects of fight or flight?

Increased heart rate and force of contraction, vasoconstriction in skin and viscera, vasodilation in muscles, lungs, brain, heart, gluconeogenesis, sweating, water retention, increased blood pressure, decreased GI motility

How are catecholamines produced?

When medullary chromaffin cells are stimulated, they produce epinephrine/norepinephrine that is exocytosed into the bloodstream. Cortisol release also assists in E/NE synthesis upon stressful stimulus

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