1. Identify urethra in this diagram.   1   2   3   4   Hint Half-n-half Clue   2. Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys?   Lungs   Thyroid   Intestine   Kidneys   Half-n-half Clue   3. True or false: Kidneys contain 10-12 million nephrons.   True   False   4. True or false: Capsule in which glomerulus is enclosed is known as external capsule.   True   False   5. Formation of urea occurs in   Small intestine   Pancreas   Kidneys   Liver   Half-n-half Clue   6. 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   7. Tuft of capillaries inside the Malpighian body is known as   Collecting ducts   Glomerulus   Nephron   Renal artery   Half-n-half Clue