Primarily phagocytic cells include all of the following EXCEPT ________.
A. lymphocytes
B. microglia
C. macrophages
D. Kupffer cells
Answer: A
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Serotonin
A. is a catecholamine neurotransmitter. B. acts as a neuromodulator. C. has an inhibitory effect on pathways that are involved in the control of muscles. D. has an excitatory effect on pathways that mediate sensations. E. is a neuropeptide.
A condition resulting from a failure of chondrocytes to multiply and enlarge is __________ dwarfism.
Fill in the blank(s) with the appropriate word(s).
To synthesize thyroid hormones, iodine is attached to
A. the amino acid tryptophan. B. acetyl coenzyme A. C. cholesterol. D. the amino acid tyrosine. E. the amino acid phenylalanine.
Which of the following blood vessels have highest resistance to blood flow?
A. elastic arteries and muscular arteries B. muscular arteries and large veins C. arterioles and capillaries D. large veins and venules E. elastic arteries, muscular arteries and large veins