Polyuria and thirst Flashcards
1
Q
What is polyuria?
A
excessive urine output
2
Q
What is polydipsia?
A
excessive drinking
3
Q
What happens in the body when you get dehydrated?
A
Increase Extracellular osmolality Osmoreceptors in hypothalamus – dehydrated and triggered Signal for production of ADH Stimulates thirst and Effect on kidney
4
Q
What doe V1 receptors do?
A
• Mediate vascular smooth muscle contraction • Stimulate prostaglandin synthesis • Stimulate liver glycogenolysis
5
Q
What doe V2 receptors do?
A
• Renal actions via
mobilisation of
aquaporin-2
6
Q
What doe V3 receptors do?
A
• ACTH release by
potentiating
action of CRH
7
Q
What is diabetes insipidus?
A
Lack of secretion or effect of ADH
