Alt YCHOLOGY VISION: IN INTRODUCTIÓ CHAPT 00.01,02.1 MULTIPLE CHOICE. Choose the

Question

Alt YCHOLOGY VISION: IN INTRODUCTIÓ CHAPT 00.01,02.1 MULTIPLE CHOICE. Choose the one alternative that best completes the statement 1) Which retinal ganglion cell will respond with the most action potentials? Aan off-center on-surround cell whose surround region is brightly illuminated B) an on-center cell with a shadow edge falling across its diameter C) an off-center on-surround cell whose center is brightly illuminated D) an on-center off-surround cell receiving a large amount of ambient (diffuse) illumination 2) 2) Retinal ganglion P cells (parvocellular) are the same as K cells B) carry information about the dynamic aspects of the world, such as movements and flicker C) are larger than M cells D) distinguish between signals from red cones and green cones and carry information about finer features and color. 3) What is NOT true about cones? 3) A) Red cones are most sensitive to long wavelenghs of light, green to middle wavelengths and blue to shorter wavelengths of light. B) In dark adaption, our cones recover from bleaching much faster than the rods and continue to be more sensitive to light than our rods while we remain in the darkened room. C) People have different numbers of red and green cones, but all have fewer, but the same number of blue cones. D) There are no blue cones in the fovea, but they are found in the periphery of the retna. 4) The blind spot 4) A) is called the optic diso B) is the location where ganglion cells are most densely packed. C) is absent inphotopic vision. D) is populated by rod phooreceptors. 5) "Grey matter" in the brain consists of 5) A) myelinated axons C) fluid-filled cavities cell bodies D) concentrations of synapses 6) What is NOT TRUE about Lesioning? 6) A) Temporary Lesioning stops aactivity in part of the brain with the help of Cooling Plates B) Lesioning is perfectly safe because the surgeon can easily see the di C) Lesioning is a surgical procedure that removes tareet an in t places on the surface or inserted into the brain. the brain areas. compares vision hafoIn

Explanation / Answer

1. D. Action potential is maximum at On Center off surround cells receiving large amount of ambient illumination.

2. d. Retinal ganglion P cells are equipped to distinguish between the finer details of colours such as red and green cones.

3.c. People differ in the number of red and green cones, but have fewer, same number of blue cone cells.

4. A. The blind spot is called the optic disc.

5. both a and b are applicable. The grey matter comprises of neuronal cell bodies as well as myelinated axons.

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