In sham-eating experiments, food is chewed and swallowed by the subjects, but rather than passing down the esophagus into their stomachs, it goes directly:
(a) into their bloodstream
(b) out of the body through a tube
(c) into their intestines
(d) into their colons
(b) out of the body through a tube
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Generally speaking, vaccinations are effective in combating future infections because they induce the production of
A. helper T cells. B. neutrophils. C. prostaglandins. D. mutations in the host genome. E. memory cells.
Which of these is NOT considered an advantage of biofuels from food crops?
A) reduced carbon emissions B) a renewable resource C) increased fuel efficiency D) increased crop prices
In using which of the following lenses should the diaphragm be almost completely open to maximize resolution?
A) low power B) high dry C) oil immersion
What criterion is used to categorize the skeleton into axial and appendicular?
A. whether the bones lie on the midline or on a girdle B. whether the bones articulate with the pelvis or not C. whether the bones contain red bone marrow or yellow bone marrow D. whether the bones are flat or long E. whether the bones are weight bearing or not