Biology (Raven), 9th Edition

Chapter 51: Osmotic Regulation and the Urinary System

Pre-Test

1
Which of these ions is NOT homeostatically maintained in vertebrates?
A)Cl-
B)Na+
C)Ca++
D)Fl-
E)All of these ions.
2
Kidneys in vertebrates produce urine by
A)filtration.
B)secretion.
C)selective reabsorption.
D)All of these.
E)None of these.
3
Of the nitrogenous wastes, which is most toxic and must be quickly removed?
A)Ammonia
B)Urea
C)Uric acid
D)All of these are equally toxic.
E)None of these are toxic.
4
The _____ is the filtering unit of the kidney.
A)glomerulus
B)proximal convoluted tubule
C)nephron
D)loop of Henle
E)vasa recta
5
Reabsorption of the nutrients and NaCl occurs in the
A)Glomerulus
B)Proximal convoluted tubule
C)Nephron
D)Loop of Henle
E)Vasa recta
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