Biology Practice Test – Excretory Systems and Mechanisms (Questions with Answers and Explanations)

Detoxication of poisonous compounds in the body is done by the _______

A. liver.      B. kidney.      C. skin.      D. stomach.

In the human excretory system the renal artery carries blood from the ______

A. aorta into the kidney.
B. aorta into the renal vein.
C. aorta into the urinary bladder.
D. aorta into urethra.

In mammals excretion takes place in the _______

A. pyramid of the kidney.
B. convoluted tubules of kidney.
C. renal veins.
D. glomerulus housed by the Bowman’s capsule.

The outermost layer of the epidermis is called ______

A. lucidum.      B. comeum.     C. malphigian.    D. granulosum.

Which of the following is a function of the kidney?

A. Storage of waste water from blood for eventual elimination.
B. Collection of carbon dioxide from the blood.
C. Maintenance of a constant osmotic pressure in the blood.
D. Deamination of excessive amino acids.