Physicians become very concerned when a person's body temperature rises above 40°C (104°F) since
A. many enzymes essential to life will be negatively affected, i.e., denatured or slowed in their actions.
B. nerve impulses will stop completely at this temperature.
C. the patient will lose the ability to communicate.
D. cell respiration will increase to the point of exhaustion.
A. many enzymes essential to life will be negatively affected, i.e., denatured or slowed in their actions.
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A dehydration reaction
A. results in the splitting of a water molecule. B. breaks down complex molecules to simple ones. C. is used to form polymers. D. forms glucose monomers from glycogen. E. form glycerol and fatty acids from triglycerides.
Genes that normally prevent cell division are
A) tumor suppressors. B) transcription factors. C) proto-oncogenes. D) oncogenes.
If two populations of a species show significant structural differences, it is likely that
A. there is little sexual reproduction between populations. B. they are reproductively isolated. C. each is specifically adapted to a certain environmental situation. D. All of the choices are correct.
It is essential for heart muscle cells to beat in a coordinated fashion. The cell junctions that would best facilitate this are
A) basal bodies. B) anchoring junctions. C) tight junctions. D) gap junctions.