The function of the muscles of the middle ear is to _____
A) ?intensify sounds at high intensities
B) ?intensify sounds at high frequencies
C) ?dampen the ossicles vibrations at high intensities
D) ?divert high frequencies to the oval window and low frequencies to the round window
C
Psychology
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_________ of neurons and glial cells are present at birth
A) Hundreds B) Thousands C) Millions D) Billions
Psychology
Which of the following is true of ion distribution across the axon membrane?
A) Sodium ions are concentrated outside the axon membrane. B) Potassium ions are concentrated outside the axon membrane. C) The action potential is the balance point between diffusion and electrostatic pressure. D) Chloride ions are concentrated inside the axon membrane. E) Sodium ions are concentrated inside the axon membrane.
Psychology