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: Kidneys contain 10-12 million nephrons.   True   False   3. Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys?   Intestine   Kidneys   Lungs   Thyroid   Half-n-half Clue   4. Formation of urea occurs in   Liver   Kidneys   Pancreas   Small intestine   Half-n-half Clue   5. Which of these is not true -- A, B, C or D? A. Kidney excretes urea. B. A small fraction of CO2 is removed through the skin. C. Small amount of salt is excreted through skin. D. Feces is excreted through the anus.   A   B   C   D   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. Main function of the _______ is to filter the wastes from the blood and excrete them in the form of urine.   Kidneys   Lungs   Endocrine glands   Urinary Bladder   Half-n-half Clue