Answer: Osmolarity detecting cells are located in the nuclei of Hypothalamus.
Step-by-step explanation:
Osmolarity is use to determined how much of osmoles of solute per liter concentration. I.e how concentrated the solute is, it is usually expressed as Osm/L. Osmolarity is detected by specialized osmolarity detecting cells called ooreceptors located in the nuclei of hypothalamus and this are stimulated by increasing blood solute concentration.