It is late at night and you are walking along a
dark sidewalk. In the bushes next to the
sidewalk you hear something moving. Your
heart starts beating fast, your pupils dilate, and
you become very anxious. The
neurotransmitter creating this effect is
a. acetylcholine.
b. norepinephrine.
c. dopamine.
d. serotonin.
e. an endorphin
B
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What is the correct hierarchy of organization, from biggest to smallest, in your body?
A. Organism, organ, organ system, tissue, cell B. Organism, organ system, organ, tissue, cell C. Organism, tissue, organ system, organ, cell D. Organism, tissue, organ, organ system, cell
Delicate ring forms and crescent-shaped gametocytes are the only forms normally observed in the peripheral blood of which Plasmodium spp.?
a. P. vivax b. P. malariae c. P. falciparum d. P. ovale
The two populations represented in boxes 1 and 2 of the figure
A. have different allele frequencies.
B. are genetically identical.
C. contain the same alleles.
D. are probably different species.
Respond to the following statements in reference to the five items listed below. Answers may be used more than once or not at all.
A. An Rh+ molecule in the body of an Rh woman is an example of these. B. These bind, as in a lock-and-key mechanism, to foreign proteins. C. D. These directly attack the foreign cells of an incompatible skin graft. E. These produce immunoglobulins in response to the reinvasion by a virus. F. Proteins produced by these bind to bacteria and viruses in the blood.