Membrane protein pores that are essentially always open are called ________ or ________ channels.
Fill in the blank(s) with the appropriate word(s).
open, leak (either order)
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Catabolism would be best described as a process that ________
A) breaks down complex structures to simpler ones B) elevates glucagon levels C) builds up triglycerides during the postabsorptive state D) causes a decline in circulating ketone bodies
Onset of labor may result from
A. increased secretion of oxytocin by the fetus. B. increased glucocorticoid secretion by the mother. C. increased progesterone secretion by the placenta. D. increased estrogen secretion by the placenta. E. decreased prostaglandins.
The sense of hearing is provided by receptors in the
-membranous endolymph. -perilymph. -organ of Schlemm. -bony labyrinth. -organ of Corti.
If the total pressure of a mixture of gases was 760 mm Hg and its composition is 20% oxygen, 0.04% carbon dioxide, 75% nitrogen, and 5% water vapor, then the partial pressure of oxygen would be
A. 740 mm Hg. B. 20 mm Hg. C. 148 mm Hg. D. 152 mm Hg. E. 200 mm Hg.