Biology (Raven), 10th Edition

Chapter 50: Osmotic Regulation and the Urinary System

Pre-Test

1
Select the correct statement about how mammals interact with their environment with respect to osmolarity.
A)They are osmoconformers.
B)They are hypotonic to their environment.
C)They are hypertonic to their environment.
D)They are osmoregulators.
E)All statement are incorrect.
2
How is urine produced in vertebrate kidneys?
A)filtration
B)secretion
C)selective reabsorption
D)All statements are correct.
E)None of the statements are correct.
3
Of the nitrogenous wastes, which is most toxic and must be quickly removed?
A)ammonia
B)urea
C)uric acid
D)All of the nitrogenous wastes are equally toxic.
E)None of the nitrogenous wastes are toxic.
4
What is the filtering unit of the mammalian kidney?
A)glomerulus
B)proximal convoluted tubule
C)nephron
D)loop of Henle
E)vasa recta
5
What is the site of reabsorption of virtually all of the nutrient molecules and about two-thirds of the NaCl from the blood filtrate in the mammalian kidney?
A)glomerulus
B)proximal convoluted tubule
C)distal convoluted tubule
D)loop of Henle
E)vasa recta
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