Which of the following is an autoimmune disease?
A. Lupus erythematosus
B. Influenza
C. AIDS
D. Tonsillitis
Answer: A
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The cilia of the hair cells of the semicircular canals are embedded in the
A) saccule. B) cupula. C) utricle. D) cristae. E) ampullae.
Among the extant vertebrates, only the bony fishes (Osteichthyes) possess bone
(a) Why, then, do we make the assumption that the ancestors of cartilaginous fishes must have had bone that was subsequently lost? (b) Why don't we think this is true for the lampreys and hagfishes?
A cataract is ________
A) cloudiness in the lens, rendering it hard and opaque B) darkening of the vitreous humor C) cloudiness in the cornea, rendering it opaque D) cloudiness in the aqueous humor
What vein drains the lower body, essentially everything below the diaphragm?
A. Superior vena cava B. Inferior vena cava C. Aorta D. Femoral vein.