★ Urinary System Quiz
_____ makes up the major percentage of kidney stones.
A. uric acid
B. urea
C. calcium
D. copper
Select your answer:
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Vessels › View
A muscle that is being regularly contracted during exercise will attract blood flow by dilating arterioles. Which of these factors would contribute to this effect?
A. heat loss from the muscle
B. increased levels of carbon dioxide
C. an increase in sympathetic tone
D. increased levels of oxygen
Biotechnology › View
What is the function of the Fc region in immunoglobulins?
A. To bind to antigens
B. To activate cells with Fc receptors
C. To form disulfide bonds
D. To determine the variable region