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Version AM-corrected: Page 1 of 9 Name:……… KEY ………. ID:………………………………. 1. What causes the blind spot of the eye? It is the point where the axons of the retinal ganglion cells leave the eye, so there are no photoreceptors Also accepted: Absence of photoreceptors at that location on the retina, optic nerve exiting the eye, axons of ganglion cells leaving the eye 2. To view nearby objects, tension on the eye lens must _____ relax or decrease _ ________. Also accepted: be reduced 3. Injecting cGMP into a rod of the retina will cause the rod to _____ depolarize ______. 4. According to Hubel and Wiesel’s experiments, how will orientation preference vary if you record from neurons in striate cortex along an electrode penetration perpendicular to the surface of the brain? The orientation tuning (or preference) of all the recorded neurons will be the same 5. Achromatopsia is likely to be the result of damage to the ___ ventral pathway _____. Also accepted: “what” pathway, temporal pathway, cones
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Version AM-corrected: Page 2 of 9 Name:……… KEY ………. ID:………………………………. 6. Opening potassium channels on the stereocilia of inner hair cells causes the inner hair cells to _____ depolarize ____. Also accepted: have an influx of potassium ions 7. To localize sound, the MSO (medial superior olive) requires the ____ volley theory ___ of sound frequency encoding to be in use by the auditory system. Also accepted: phase-locking 8. Lesioning the LSO (lateral superior olive) on the right side of the brain will disrupt sound localization from which side(s) of the body? Both (you need both LSO’s to accurately localize sound from either side of the body) 9. Name one part of the brain that receives direct input from the retina _____ lateral geniculate nucleus ________. Also accepted: superior colliculus 10. “Reciprocal innervation” suggests that ___ synergistic __ muscle(s) will be activated at the same time that ____ antagonistic _______ muscle(s) will be relaxed. 11. What neurotransmitter(s) is/are released by bipolar cells? ____ glutamate ___.
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