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UCSD PSYC 2 EXAM 2 QUESTIONS & ANSWERS 2024/2025
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UCSD PSYC 2 EXAM 2 QUESTIONS & ANSWERS 2024/2025 sensory receptor - ANSWERSspecialized neuron that detects a particular category of physical events sensory transduction - ANSWERSthe process by which sensory stimuli are transduced into slow, graded receptor potentials receptor potential -...

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  • October 22, 2024
  • 30
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ucsd psyc 2 exam 2 questions answers

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UCSD PSYC 2 EXAM 2 QUESTIONS &
ANSWERS 2024/2025

sensory receptor - ANSWERSspecialized neuron that detects a particular category of physical events



sensory transduction - ANSWERSthe process by which sensory stimuli are transduced into slow, graded
receptor potentials



receptor potential - ANSWERSslow, graded electrical potential produced by a receptor cell in response to
a physical stimulus that affects the release of neurotransmitters and modify the pattern of firing in
neurons with which sensory receptors form synapses



receptive fields - ANSWERSgroup of sensory receptors that send signals to the neuron



light travels at a constant speed of approximately - ANSWERS300,000 km (186,000 miles) per second



perceptual dimensions of color - ANSWERShue, brightness, and saturation



hue - ANSWERSdominant wavelength



brightness - ANSWERSintensity



saturation - ANSWERSrealtive purity



electromagnetic spectrum order - ANSWERSgamma rays, x-rays, UV rays, infrared rays, radar, television /
radio, AC circuits



saccadic movements - ANSWERSyou shift your gaze abruptly from one point to another

,pursuit movement - ANSWERSmovement that eyes make to maintain an image of a moving object on
fovea



cornea - ANSWERSouter layer at front of eye; transparent



pupil - ANSWERSopening in iris; pigmented ring of muscles behind cornea



lens - ANSWERS-transparent, onionlike layers

-highly flexible

-more rounded = near objects

-more stretched = far objects

-good for gathering light from world and projecting clear image on retina



accommodation - ANSWERSchanges in thickness of the lens of the eye, accomplished by the ciliary
muscles, that focus images of near or distant objects on retina



retina - ANSWERSinterior lining of back of eye where receptor cells are located



rod - ANSWERS-sensitive to light of low intensity; not present in fovea; provides only monochromatic
info; poor acuity -high convergence, so HIGH sensitivity and LOW spatial resolution



cone - ANSWERS-photopic (daytime) vision; high-acuity color info in good lighting; encodes color vision;
sensitive to moderate-to-high levels of light; provides info about hue; excellent acuity -low convergence,
so LOW sensitivity and HIGH spatial resolution



fovea - ANSWERScentral region of retina that mediates our most acute vision; only contains cones



optic disk - ANSWERSwhere axons conveying visual info gather together and leave eye through optic
nerve (blind spot)

, bipolar cells - ANSWERSneurons located in middle layer of retina that conveys info from photoreceptors
to ganglion cells



ganglion cell - ANSWERS-neurons located in retina that receives visual info from bipolar cells; its axons
give rise to optic nerve

-first cells to interpret color info



horizontal cell - ANSWERSneuron in retina that interconnects adjacent photoreceptors and outer
processes of bipolar cells



amacrine cell - ANSWERSneuron in retina that interconnects adjacent ganglion cells and inner processes
of bipolar cells



lamella - ANSWERSlayer of membrane containing photopigments; found in rods and cones of retina



dorsal lateral geniculate nucleus (LGN) - ANSWERSin thalamus; receives input from retina and projects to
primary visual cortex



magnocellular layer - ANSWERS-one of inner two layers of neurons in dorsal lateral geniculate nucleus;
transmits info necessary for perception of form, movement, depth, and small differences in brightness to
primary visual cortex

-no color

-high sensitivity to contrast

-low spatial resolution

-fast temporal resolution



pavocellular layer - ANSWERS-one of four layers of neurons in dorsal lateral geniculate nucleus; transmits
info necessary for perception of color and fine details to primary visual cortex

-color: from "red" and "green" cones

-low sensitivity to contrast

-high spatial resolution

-slow temporal resolution

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