For Teratogens That Show a Dose-Response Relation

question 61

Multiple Choice

For teratogens that show a dose-response relation

• A) any level of exposure to the teratogen causes an equivalent likelihood of a defect.
• B) the greater the exposure to the teratogen, the greater the likelihood of a defect.
• C) the greater the exposure to the teratogen, the lesser the likelihood of a defect.
• D) detrimental effects are seen only at very high exposure levels.

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Definitions:

Myringotomy

A surgical procedure to make a tiny cut in the eardrum to relieve pressure caused by excessive fluid accumulation or to insert a tympanostomy tube.

Myringoplasty

A surgical procedure to repair a perforation of the tympanic membrane in the ear to restore hearing and prevent infections.

Eustachian Tube

A canal that connects the middle ear to the nasopharynx, helping to equalize air pressure on both sides of the eardrum.

Oval Window

A membrane-covered opening that leads from the middle ear to the vestibule of the inner ear.