THC, the active ingredient in marijuana, mimics the function of the neurotransmitter ____, resulting in a variety of
effects including ____.
a. dopamine; increased pain perception
b. norepinephrine; hallucinogens
c. GABA; nervousness
d. serotonin; loss of appetite
e. anandamide; memory loss
ANSWER: e
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Characteristics of genetically engineered plants and plant products include
(a) better nutrition. (b) longer storage lives. (c) resistance to disease and insects. (d) all of the above.
In animals, the evolutionary development of cephalization is most associated with ____
a. bilateral symmetry b. radial symmetry c. ganglia d. nerve nets e. nerves
Neuropeptide neurotransmitters
a. can act as a direct neurotransmitter between neurons and muscle cells. b. can act as a postsynaptic membrane inhibitors. c. directly open K+ channels to inhibit neurons. d. can act as pain reducers and initiate euphoria. e. directly inhibit euphoria.
Cells able to divide and form some types of cells in an organism are called:a
pluripotent stem cells. b. terminal differentiation cells. c. determinate cells. d. morphogenic cells. e. developmental plastic cells.