The Thirst Center in the Hypothalamus Is Stimulated by ________

The thirst center in the hypothalamus is stimulated by ________ of the extracellular fluid, and is inhibited by ________.

A) an increase in the osmotic pressure; distension of the stomach by water
B) a decrease in the osmotic pressure; stimulation of osmoreceptors
C) a decrease in sodium ions; an increase in sodium ions
D) nerve impulses from the cerebrum; nerve impulses from the thalamus