Each spinal nerve carries afferent sensory fibers from a particular region on the body surface called a(n):
a. sensory region
b. organ
c. skin patch
d. dermatome
e. afferent zone
d
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The difference in hydrogen ion concentration between solutions with pH 4 and pH 5 is
A. tenfold. B. twofold. C. twentyfold. D. fivefold.
The corticospinal tracts that synapse on motor neurons in the anterior gray horns of the spinal cord are visible as they descend along the ventral surface of the medulla as a pair of thick bands, the ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a source of ionizing radiation?
A) Atomic and nuclear weapons B) Cosmic rays from outer space C) Cholesterol and triglycerides D) Smoke detectors
The building blocks of many lipids include
A. polysaccharides. B. polypeptides. C. fatty acids and glycerol. D. amino acids. E. monosaccharides.