The most common neurotransmitter in the central nervous system (CNS) is _____
A) acetylcholine
B) epinephrine
C) glutamate
D) nitric oxide
E) gamma-aminobutyric acid (GABA)
Answer: C
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The total number of viable microorganisms remains constant in stationary phase because
A. either there is a balance between cell division and cell death or there is a cessation of cell division even though the cells may remain metabolically active. B. there is a balance between cell division and cell death. C. there is a cessation of cell division even though the cells may remain metabolically active. D. None of the choices are correct.
Which of the following antibodies is a dimer?
A. IgA B. IgD C. IgM D. IgE
PCR can be used _____
a. to increase the number of specific DNA fragments b. in DNA fingerprinting c. to modify a human genome d. to increase the number of specific DNA fragments and in DNA fingerprinting
A decrease in blood glucose from skipping a meal will cause the ____ to secrete glucagon, which will cause the ____ to break down glycogen into glucose.
A. liver; pancreas B. pancreas; gall bladder C. spleen; pancreas D. pancreas; spleen E. pancreas; liver