Test Bank for Nester’s
Microbiology 10th Edition
Questions and Answers
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Page 1 of 34 Test Bank for Nester’s Microbiology 10th Edition Questions and Answers.pdf
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Retina
the part of the eye that detects light
Two types of photoreceptors
rods and cones
Rods
Scotopic Vision, Night vision, primarily in the periphery, not sensitive to color
Cones
Photopic vision, Day vision, provides high detail color images, located in the center of the eye
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Rhodopsin
the pigment in rod cells that causes light sensitivity
Photopigments
chemicals in photoreceptors that respond to light and assist in converting light into neural activity
General Sensory Process
physical stimulus, physiological response, sensory experience
The Optic Array
the amount of light we can detect at any given moment
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Horizontal cells
share information across photoreceptors and bipolar cells
Bipolar cells
eye neurons that receive information from the retinal cells and distribute information to the ganglion cells
Ganglion cells
connect to bipolar cells, carry information to the brain; the bundled axons of the ganglion cells form the optic nerve
Through pathway
transmits signals from photoreceptors to RGCs via bipolar cells; this is the principle flow of signals through the retina,
triggers an action potential, high detail, 1 to 1
Lateral pathway
horizontal cells receive info from photoreceptors and communicate with other photoreceptors, amacrine cells also
receive info from bipolar cells and communicate with other bipolar cells and RCG's, allows the visual system to
compare and contrast info about light
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