1. Formation of urea occurs in   Kidneys   Liver   Pancreas   Small intestine   Hint Half-n-half Clue   2. Which of these is not a function of kidneys? A. Maintenance of acid base balance. B. Excretion of nitrogenous waste products. C. Temperature regulation. D. Maintenance of water balance.   A   B   C   D   Half-n-half Clue   3. Tuft of capillaries inside the Malpighian body is known as   Nephron   Collecting ducts   Glomerulus   Renal artery   Half-n-half Clue   4. True or false: Kidneys contain 10-12 million nephrons.   True   False   5. Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys?   Kidneys   Thyroid   Intestine   Lungs   Half-n-half Clue   6. Main function of the _______ is to filter the wastes from the blood and excrete them in the form of urine.   Urinary Bladder   Endocrine glands   Lungs   Kidneys   Half-n-half Clue   7. Which of these is not a normal constituent of urine: sugar, urea or creatinine?   Urea   Creatinine   Sugar   Half-n-half Clue