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

Hello and Welcome to Biology Practice Test – Excretory Systems and Mechanisms

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Purified blood leaves the kidney in the ______

A. renal artery.     B. renal capillary.    C. ureter.    D. renal vein.

The outermost layer of the epidermis is called ______

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

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.

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.

The actual concentration of urine takes place in the _______

A. loop of Henle.
B. collecting duct.
C. proximal convoluted tubule.
D. distal convoluted tubule.



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