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ReviewEx2 - BIO 229 HUMAN PHYSIOLOGY EXAM 2 REVIEW...

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BIO 229 HUMAN PHYSIOLOGY EXAM 2 REVIEW QUESTIONS Spring 2009 1. In the auditory system, what is the physiological relevance of the: pinna (auricle)?; tympanic membrane?; middle ear ossicles?; stapedius muscle?; oval window?; round window?; cochlea?; the parts of the organ of Corti?; hair cells?; stereocilia?; kinocilium? 2. How are sound waves that enter the ear converted into electrical signals in the auditory nerve? That is, how are the sound waves transduced at the level of the hair cell? 3. How does the auditory system discriminate pitch and loudness? What features of the basilar membrane and hair cells contribute to frequency tuning? 4. What determines whether someone suffers from conduction deafness or sensory deafness? 5. In the visual system, what is the physiological relevance of the: cornea?; fovea centralis?; optic disc?; nasal/temporal hemiretina?; rods and cones?; ganglion cells?; optic nerve?; optic chiasm?; lateral geniculate nucleus?; superior colliculus?; visual cortex? 6. In the visual system, what is meant by the term “convergence” and where on the retina is it more likely/less likely to occur? 7. How is light transduced into a receptor potential in a rod cell?
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