AP Biology - Osmoregulation

What strategy do osmoconformers employ?

External and internal = same osmolarity (balanced)

Antidiuretic Hormone

Hormone that regulates water reabsorption in the collecting duct

What organ do we osmoregulate with?

Kidney

What is the issue of freshwater fish?

Water wants to flow inside of them.

What is responsible for the color of your urine?

amount of ADH (amount of water, more water = clear)

Osmolarity

concentration of solutes: water (usually measured in moles)

Osmosis

diffusion of water across a membrane, from high concentration to low concentration

Saltwater fish have to ______ salt water and their urine is ______.

drink; highly concentrated

All of the work of the Loop of Henle is to set up a ________________________.

gradient for osmosis.

It is important that the cells in our body remain _________.

isotonic (equal).

What happens on the ascending side of the loop of Henle?

lose salt (permeable to salt, not permeable to water)

What do we have inside our kidneys?

nephron

Osmoregulators are different, they _________ the amount of water inside of them.

regulate

What do brine shrimp spend 30% of their energy on?

regulating the balance of osmolarity

What happens on the descending side of the loop of Henle?

water flows out (osmolarity increases)