1. Which of these is not a normal constituent of urine: sugar, urea or creatinine?   Creatinine   Sugar   Urea   Hint Half-n-half Clue   2. True or false: Capsule in which glomerulus is enclosed is known as external capsule.   True   False   3. Main function of the _______ is to filter the wastes from the blood and excrete them in the form of urine.   Endocrine glands   Kidneys   Lungs   Urinary Bladder   Half-n-half Clue   4. Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys?   Lungs   Kidneys   Intestine   Thyroid   Half-n-half Clue   5. 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   6. Identify urethra in this diagram.   1   2   3   4   Half-n-half Clue   7. True or false: Kidneys contain 10-12 million nephrons.   True   False