The speed of an action potential depends upon
A. whether an axon is myelinated or not myelinated.
B. thickness of the myelin sheath.
C. the diameter of the axon.
D. All of the choices are correct.
D
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Tom is a 45-year-old male that has lost his ability to hear high frequency sounds. The most likely explanation for this would be ________
A) damage to the hair cells near the oval window in the cochlear duct B) middle ear infection C) an overgrowth of bony tissue, fusing the ossicles together D) a perforated tympanic membrane
Infection and swelling of the tonsils is called __________.
Fill in the blank(s) with correct word
The endoneurium is composed of
A. areolar connective tissue. B. dense irregular connective tissue. C. dense regular connective tissue. D. pseudostratified nonkeratinized epithelium. E. simple squamous epithelium.
As the pitch of a sound gets higher, displacements of the basilar membrane:
A. occur closer to the oval window. B. occur closer to the helicotrema. C. occur uniformly throughout the membrane. D. become greater in amplitude. E. become smaller in amplitude.