| QUESTION | ANSWER | EXPLANATION |
| Tuft of capillaries inside the Malpighian body is known as | Glomerulus | |
| Formation of urea occurs in | Liver | Urea is a metabolic waste product, synthesized in the liver and excreted through the kidneys. |
| Which of these is not a normal constituent of urine: sugar, urea or creatinine? | Sugar | In diabetes, sugar is excreted in urine. |
| Which of these is not an excretory organ: intestine, lungs, thyroid or kidneys? | Thyroid | Thyroid is an endocrine gland. |
| Main function of the _______ is to filter the wastes from the blood and excrete them in the form of urine. | Kidneys | |
| Bag like structure in which urine is stored. | Urinary Bladder | |
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 | Each kidney is covered by a thin capsule. |
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. | B | CO2 is removed through lungs. Skin excretes water and salts. |
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. | C | Temperature regulation is a function of hypothalamus (a part of brain). |
Identify urethra in this diagram.
 | 4 | |
| True or False: Malpighian body is a part of nephron. | True | |
| True or false: Capsule in which glomerulus is enclosed is known as external capsule. | False | It is known as Bowman's Capsule.
 |
| True or false: Kidneys contain 10-12 million nephrons. | False | Nephron is the structural and functional unit of kidney. Each kidney contains about 1.2 million nephrons. |
