Adrenal Gland (Basic)
- Adrenal Cortex
- RAAS Stimulates Aldosterone
- CRF (CRH) acts on Anterior Pituitary Gland to Release ACTH
- Cortisol Released
- Androgens Released
- Adrenal Medulla
- Epinephrine & Norepinephrine
Adrenal Gland (Advanced)
- Adrenal Cortex
- Zona Glomerulosa
- Aldosterone
- Zona Fasciculata
- Cortisol
- Zona Reticularis
- Androgens
- Adrenal Medulla
- Chromaffin Cells
- Epinephrine & Norepinephrine
Low Blood Pressure Response
- Posterior Pituitary Releases Vasopressin
- Vasoconstriction
- Adrenal Cortex Releases Aldosterone
- Increased Na+ and H2O Reabsorption
High Blood Pressure Response
- Atria Release Atrial Natriuretic Peptide
- Vasodilation
- Antagonizes Aldosterone
- Na+ and Water Excreted
Renin Angiotensin Aldosterone System (RAAS) Regulators
- Hypotension
- Hypovolemia
- Decreased NaCl Delivery to Macula Densa
- Sympathetic Stimuli
- Angiotensin II
- Aldosterone
- Antidiuretic Hormone
- Atrial Natriuretic Peptide and Brain Natriuretic Peptide
Angiotensin II Synthesis
- Juxtaglomerular Cells
- Mesangial Cells
- Macula Densa
- Distal Tubule
- Angiotensinogen
- Secreted from Liver
- Renin
- Secreted from Juxtaglomerular Cells
- Catalyzes Angiotensinogen to Angiotensin I
- Angiotensin Converting Enzyme (ACE)
- Pulmonary Capillaries
- Catalyzes Angiotensin I to Angiotensin II
Angiotensin II Effects
- Increases Vascular Smooth Muscle Contraction
- Increases Blood Pressure
- Efferent Arteriole Vasoconstriction
- Increases GFR
- Proximal Tubule
- Sodium and Water Reabsorption
- Adrenal Cortex
- Increases Aldosterone Secretion
- Stimulates Posterior Pituitary Gland to Secrete Vasopressin (ADH)
- Stimulates Thirst in Hypothalamus