This figure shows a cross section of the spinal cord. What structure does number 2 indicate?
A. Gray commissure
B. Posterior horn
C. Posterior funiculus
D. Anterior horn
E. Lateral horn
Answer: A
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All parasympathetic neurons are
A) adrenergic. B) cholinergic. C) nitroxidergic. D) gamma-aminobutyric. E) dopaminergic.
The term fetus is used:
a. after the first 8 weeks of pregnancy b. after the blastocyst has implanted in the uterine wall c. during the entire pregnancy d. from fertilization to the end of the eighth week of pregnancy
Layers of bone matrix between osteons are:
a. concentric lamella b. interstitial lamella c. circumferential lamella d. trabecula
Which condition is a disorder of the brain characterized by destruction of brain cells caused by a defective gene?
A. Huntington's disease B. Parkinson's disease C. Alzheimer's disease D. Cerebrovascular accident