Why is production of lung surfactant important for a baby?
A) Lung surfactant may block the placenta from exchanging oxygen.
B) Without lung surfactant, the baby's lungs do not develop properly.
C) Lung surfactant keeps the lung sacs from collapsing.
D) Lung surfactant keeps the lungs from sticking to the diaphragm.
Answer: C
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Dehydration reactions are involved in
A. the formation of polypeptides. B. the formation of polysaccharides. C. the formation of monosaccharides. D. the formation of nucleotides. E. the formation of polypeptides AND the formation of polysaccharides.
What occurs when the Northern Hemisphere is most tilted away from sun and has its shortest day?
a. winter solstice b. summer solstice c. spring equinox d. autumn equinox e. both solstices
Which part of the mammalian brain is
disproportionately smaller than the corresponding part of a fish brain? a. medulla oblongata b. thalamus c. pons d. midbrain e. cerebrum
Histamine is produced by_______ specifically to promote acute inflammation.
a) Neutrophils b) Plasma Cells c) T-helper Cells d) Mast Cells