Autonomic tone is regulated by the
a) medulla oblongata.
b) cerebellum.
c) cerebrum.
d) vermis.
e) hypothalamus.
e
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What is the normal specific gravity range of urine in humans?
a) 2.350 - 3.700 b) 0.002 - 1.000 c) 4.6 - 8.0 d) 1.001 - 1.035 e) 1.04 - 2.60
The functional and structural unit of the kidneys is the ________.
A) nephron B) loop of Henle C) glomerular capsule D) basement membrane of the capillaries
Four species of salamanders in the genus Desmognathus form a streamside salamander guild in the mountains of North Carolina. The four species are found at different distances from the stream, as listed in the table
Suggest one or more hypotheses to explain the relationship between the body sizes of these species and the distance each is found from the water. What prediction can you make for each hypothesis, and how could you test that prediction? Species D. quadramaculatus D. monticola D. ochrophaeus D. anaeus Adult body length 100-175 mm 83-125 mm 70-100 mm 44-57 mm Distance from stream Less than 10 cm Less than 1 m 1-4 m 4-7 m
Which of the following is not a function of the control center within a feedback mechanism?
A. Detects a change in the value of a variable B. Controls effectors C. Receives and processes information D. Establishes a set point