Target cells make more receptors for a particular hormone when the level of that hormone declines in the blood stream. This process is known as:
A) upregulation. B) the second-messenger system.
C) synergism. D) downregulation.
Answer: A
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One mole of any element has the same
A) mass. B) weight. C) number of atoms. D) number of electrons. E) All of the answers are correct.
Where are unmyelinated nerve fibers surrounded by Schwann cells?
A. In the PNS B. In the CNS C. In the PNS and CNS D. Nowhere. Unmyelinated nerve fibers are never surrounded by Schwann cells.
What is the primary digestive function of the pancreas?
A) to produce hormones that increase digestion in the small intestine B) to produce acid for the digestion of proteins in the stomach C) to produce mucus for the ease of feces passing through the rectum D) to produce bile for the digestion of lipids E) to produce buffers and enzymes for the digestion of starches, lipids, nucleic acids, and proteins
Lumbar vertebrae are ________ massive and ________ mobile
A) least; most B) most; most C) least; least D) not; excessively E) most; least