The pulmonary circuit of blood flow pumps blood to the ____
a. heart
b. brain
c. liver
d. lungs
e. all body cells
ANSWER: d
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Cartilaginous fish (chondrichthyes):
A. have well-developed kidneys. B. may have teeth made of bone. C. are generally freshwater species. D. have a swim bladder.
In the genetic code, both AAU and AAC code for asparagine. For this reason, the code is said to be
A) degenerate. B) nonspecific. C) universal. D) ambiguous. E) wobbly.
Cytotoxic T cells may release complement to destroy an infected body cell.
a. true b. false
Hypertension damages the lining of the arterioles of the kidneys, which results in the release of molecules that further raise blood pressure. This is an example of a(n)
A) positive feedback loop. B) uncontrolled mechanism. C) controlling mechanism. D) negative feedback loop. E) electrochemical mechanism.