A myelin sheath is composed primarily of __________.
A. lipids
B. carbohydrates
C. glycoproteins
D. proteins
E. polysaccharides
A. lipids
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Which condition is associated with a paralysis of facial muscles on one side of the face that often disappears spontaneously after three to five weeks?
A. Tic douloureux B. Bell palsy C. Meningitis D. A stroke E. Aphasia
Viagra is a drug used to treat erectile dysfunction by dilating arteries in the penis. The
neurotransmitter that Viagra affects is A) nitric oxide. B) acetylcholine. C) serotonin. D) histamine.
The ________ is a bone that forms in the quadriceps tendon of the knee.
Fill in the blank(s) with the appropriate word(s).
Where in the body are hematopoietic stem cells found?
A. Red bone marrow B. Spleen C. Liver D. Yellow bone marrow E. Thymus