When you forget to drink water and get dehydrated, your blood becomes thicker and harder to pump. Your kidneys respond by stopping urine production, which sends the water from your urine into your bloodstream to thin your blood back to normal levels.

This would be negative feedback right?

Question

When you forget to drink water and get dehydrated, your blood becomes thicker and harder to pump. Your kidneys respond by stopping urine production, which sends the water from your urine into your bloodstream to thin your blood back to normal levels.

This would be negative feedback right?

Ferredoxin4 · Answer

ADH feedback loop and urinary tract system always negative feedback. What stops the urine production is the hormone, antidiuretic hormone. As the blood osmolarity decreases due to dehydration (so more solutes in blood), a osmoreceptor in the hypothalamus of the brain receives the message and signals the pituitary gland to secrete ADH. ADH will allow the reabsorption of water back into the blood.

Gdeinward · Answer

wouldn't a simple rule be positive feedback amplifies change while negative feedback reduces change?

Ferredoxin4 · Answer

Yeah you could say that. I'm just explaining the process.

Gdeinward · Answer

Thats perfectly understood, and great job for it, I just was kinda thinking outloud I guess.

iosangel · Answer

wait In a negative feedback loop, the initial signal is amplified to a max?

iosangel · Answer

or the same

Ferredoxin4 · Answer

Positive - a stimulation yields more stimulation
Negative - a stimulation will lower action/product till it stops

iosangel · Answer

ok