Which of the following structural differences between children and adults predisposes children to middle ear infections?
a. The fluid-filled cochlea is less developed in children than in adults.
b. Children have shorter, more horizontal, and more flaccid eustachian tubes.
c. The outer ear of children is shorter and has fewer barriers, such as hair, in the ear.
d. The semicircular canals are straighter and shorter in a child's ear.
B
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A Incorrect. Children do not have less developed fluid-filled cochlea than adults.
B Correct. The structural differences between children and adults that predispose children to middle ear infections is that children have shorter, more horizontal, and more flaccid eustachian tubes.
C Incorrect. Having shorter outer ears with fewer barriers, such as hair, in the ear does not predispose children to middle ear infections.
D Incorrect. The semicircular canals are not straighter and shorter in a child's ear.
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