Description

In this BoardsCast episode, we begin Tobias Chapter 120 — Adrenal Glands with the one mental model that makes adrenal disease finally feel logical:

You’re not treating a gland. You’re treating the body’s emergency operating system.

The adrenal gland is a survival switchboard that runs three different “programs,” all with the same mission: keep the organism alive under threat. 

We break down the three survival systems:

• Aldosterone (zona glomerulosa): volume/pressure survival — the internal “IV bag,” driven by RAAS 
• Cortisol (zona fasciculata): chronic stress adaptation — reallocates fuel by making glucose and breaking down fat and muscle 
• Catecholamines (medulla): immediate crisis response — a modified sympathetic ganglion that dumps epinephrine/norepinephrine into the blood for sustained fight-or-flight 

Then we connect physiology to what the boards actually test: cortex disease looks like slow metabolic burnout; medulla disease looks like explosive hemodynamic storms. 

Key takeaway: Adrenal disease is a survival chemistry losing regulation.

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