Interferons ________
A) are routinely used in nasal sprays for the common cold
B) are virus-specific, so that an interferon produced against one virus could not protect cells against another virus
C) act by increasing the rate of cell division
D) interfere with viral replication within cells
D
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Which curves of the vertebral column are present at birth?
A. Thoracic and sacral B. Lumbar and cervical C. Lumbar and sacral D. Cervical and thoracic E. Lumbar and thoracic
The "O" in OD stands for __________
Fill in the blank(s) with correct word
An increased secretion of H+ ions in the kidney has the greatest direct effect on the tubular secretion of ____ ions
a. calcium b. chloride c. phosphate d. potassium e. sodium
What is the purpose of motor nerve varicosities as they relate to smooth muscle?
A. They prevent single-unit smooth muscle cells from pulling apart. B. They enable each cardiomyocyte to directly stimulate its neighbors. C. They link the thin filaments to the inside of the sarcolemma in smooth muscle. D. They reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down. E. They release neurotransmitter molecules onto smooth muscle cells.