A ____ feedback control system functions when a change in the internal environment triggers the body to oppose the
change and restore the normal environmental conditions.
a. positive
b. physiological
c. reflex
d. negative
e. anatomical
ANSWER: d
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Atoms become ____ in order to achieve a full outer orbital shell
a. free radicals b. ions c. unstable d. radioactive e. covalents
Tropical rain forests provide all of the following EXCEPT
A) traditional medicines. B) wood used for cooking by local residents. C) hardwoods for consumers worldwide. D) ecotourism. E) large supplies of gasoline.
Figure 15.4
In step 2 (above) in the identification of the colony that contains a targeted gene, ____.
A. bacterial cells are cloned B. bacterial colonies are transferred C. bacterial cells are ruptured D. DNA is lysed E. cells with the targeted gene are identified
Most CO2 is transported to the lungs in which of the following ways?
A) dissolved in the plasma B) as carbonic acid C) bound to water D) attached to hemoglobin or as bicarbonate ions