Causes of intellectual developmental disorder cited in your text include which of the following?

Sound waves are amplified in the middle ear by tiny bones called the hammer, anvil and the stirrup, which serves to push against the __________ and set fluid in the cochlea in motion

a) tympanic membrane b) oval window c) basilar membrane d) auditory nerve

What is one reason douching does not prevent pregnancy?

A) Because sperm are sticky and cannot be flushed away B) Because sperm are traveling toward the uterus in fifteen seconds; douching is too late C) Because sperm has a pH value opposite to douches D) Because a woman's immune system protects sperm