Which of these hormones activates the adrenal cortex to release aldosterone?

Starfishes are aminotelic organisms.

On which segment onwards, the nephric filtrate is called as urine?

What is the percentage of urea present in the urine?

Which of the following is not correct regarding PCT?

The presence of ketone bodies is an indication of which of the following diseases?

By which protein is the blood colloidal osmotic pressure maintained?

Which of the following organs does not help in the elimination of excretory wastes?