PHA 329 ADH

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Last updated 12:00 AM on 8/28/26
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6 Terms

1
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Characteristics?

ADH, also known as vasopressin

• Peptide

• Activates vasopressin receptors

2
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Physiological effects?

• Kidneys/renal: water reabsorption from collecting ducts

• Blood vessels: arteriole vasoconstriction (when ADH levels are very high)

• Overall: increased blood pressure (BP), increased fluid volume,

decreased urination

3
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Target tissues?

Kidneys

Blood vessels

4
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Stimulates release?

High blood osmolarity

• Low blood pressure (hypotension) / low blood

volume (hypovolemia)

• Angiotensin II

5
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Inhibits release?

Low blood osmolarity

• High blood pressure (hypertension) / high blood

volume (hypervolemia)

• Alcohol

6
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Additional information?

Levels peak overnight

• Medical conditions

• Low ADH  diabetes insipidus

• High ADH  syndrome of inappropriate ADH secretion (SIADH)