Which statement is correct?
nuclear medicine uses radioactive material that attached itself to a specific molecule in the body.

nuclear medicine uses radio waves to determine organ function.

nuclear medicine is a test that is often used to diagnose abnormalities in pregnancy.

nuclear medicine is used in conjunction with ultrasound to perform a pet scan.

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.