alleryStart learning →Why does antidiuretic hormone also carry the name vasopressin?
AIt is stored in the walls of large arteries
BIt is broken down by enzymes in the vessels
CIt is released whenever blood pressure falls
DIt constricts blood vessels at high levels
Answer & Solution
Correct answer: D. It constricts blood vessels at high levels
1. At ordinary levels antidiuretic hormone works on kidney water handling.
2. At very high concentrations it also constricts blood vessels.
3. That constriction raises peripheral resistance and therefore blood pressure, which is the pressor action behind the second name.
4. It is stored in the posterior pituitary, not in arterial walls.
5. Its release is driven by rising blood osmolarity sensed by hypothalamic osmoreceptors, not by a fall in pressure.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 17 "The Endocrine System", section 17.3 The Pituitary Gland and Hypothalamus_
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