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Pre-Test
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1
The kidney is a complex organ made up of a million repeating units called a
A)collecting duct.
B)glomerulus.
C)nephron.
D)flame cell.
2
Freshwater fish solve the problem of swelling up with water from their environment by
A)drinking water.
B)not drinking water.
C)excreting a dilute urine.
D)excreting concentrated urine.
E)Both 2 and 3
3
Which of the following is(are) not filtered at the kidney?
A)Red blood cells
B)White blood cells
C)Proteins
D)All of the above
4
Mammals eliminate nitrogen containing wastes from the degradation of amino acids in the form of _______________, as ammonia is too toxic to excrete.
A)urea
B)ammonia
C)uric acid
D)guano
5
________________ is defined as the dynamic constancy of the internal environment.
A)Negative feedback
B)Homeostasis
C)An integrating center
D)Osmoregulation





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