alleryStart learning →Why does ADH also carry the name vasopressin?
ABecause it presses on the vascular baroreceptors
BBecause it lowers pressure inside the vessels
CBecause it was first found inside blood vessels
DBecause at high levels it causes vasoconstriction
Answer & Solution
Correct answer: D. Because at high levels it causes vasoconstriction
1. Early researchers studied the hormone at unusually high secretion levels.
2. At those levels it caused vasoconstriction, which is vasopressor activity, and the name followed.
3. Its antidiuretic properties, the ones that matter most in ordinary physiology, were identified only later.
4. Synthetic ADH is still used occasionally to stem life-threatening esophagus bleeding, which depends on that same vasoconstrictor action.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 25 "The Urinary System", section 25.9 Regulation of Fluid Volume and Composition_
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