CBNS 106 Final Exam Review Questions & Answers 2024/2025
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Course
CBNS 106
Institution
CBNS 106
CBNS 106 Final Exam Review Questions & Answers 2024/2025
Systems - ANSWERScircuits of neurons that interact to perform some function
Neural Codes - ANSWERSfundamental concept, basically the activity of a neuron depends on the system it's a part of. ie. Action potential by neurons in the vis...
CBNS 106 Final Exam Review Questions
& Answers 2024/2025
Systems - ANSWERScircuits of neurons that interact to perform some function
Neural Codes - ANSWERSfundamental concept, basically the activity of a neuron depends on the system
it's a part of. ie. Action potential by neurons in the visual system yield perception of light
Retina - ANSWERSmade of several thin layers
back part of the eye where light hits
'inside-out' with photoreceptors farthest from light because all other cells are clear
fovea - ANSWERSlight from the object you're looking at falls here
highest acuity (see fine details and patterns of light)
everything except photoreceptors are pushed out of the way
optic disk - ANSWERSretinal location where axons from a type of retinal cell collect and exit the eye and
for the optic nerve
creates blind spot
receptive field - ANSWERSlocation in the environment (or surface of the body) when the appropriate
stimulus will change that cell's activity
concentric cirles for retinal cells (on and off center RGCs)
Off Center RGC produce more AP in dark
on and off center have opposite reactions
retina cell types - ANSWERSPhotoreceptors
bipolar cells
, retinal ganglion cells
horizontal cells
amacrin cells
Photoreceptor types - ANSWERSrods and cones
responsible for seeing things
project to bipolar cells
rods - ANSWERS92 million in each human retina
can't see color
nightvision (work in very dim light but bleached in bright light)
movement
outside fovea
have rhodopsin
outer segment is larger, that's why more sensitive to light
mroe photopigment densely packed into optic disks, so absorb more light
cones - ANSWERS5 million in each human retina
see color: red blue and green
concentrated in fovea
don't work in dim light
have coneopsin
don't get bleached out
retinal ganglion cells - ANSWERS(RGC) only cell that gets info from in the eye to outside the eye, end at
LGN
only eye cells with axons for long-distance info travel
can make action potential like amacrin cells
closest to light
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