1. 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   Hint Half-n-half Clue   2. Which of these is not a normal constituent of urine: sugar, urea or creatinine?   Sugar   Urea   Creatinine   Half-n-half Clue   3. True or false: Capsule in which glomerulus is enclosed is known as external capsule.   True   False   4. Bag like structure in which urine is stored.   Kidney   Stomach   Urinary Bladder   Ureter   Half-n-half Clue   5. Identify urethra in this diagram.   1   2   3   4   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. Which is not true regarding kidneys? A. They do not have any capsule. B. They are bean shaped and reddish brown in color. C. Each kidney is divided into 2 parts - cortex and medulla. D. They are the main excretory organs.   A   B   C   D   Half-n-half Clue