osmoregulation and ADH

Question 1

what happens when you become dehydrated?

Answer 1

• blood water potential decreases
• osmoreceptors in hypothalamus detect this
• posterior pituitary secretes antidiuretic hormone
• ADH carried in the bloodstream to bind to specific receptor proteins in the collecting duct
• increases its permeability to water so water moves out by osmosis

Question 2

more ADH

Answer 2

less piss