Introduction to Vision Flashcards Preview

Biology 222 > Introduction to Vision > Flashcards

Flashcards in Introduction to Vision Deck (6)
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1
Q

what is the role of the visual system?

A

to extract useful features from light signals to help guide animal behavior to optimize their survival and reproductive opportunities.
useful features - color, depth, motion, size

2
Q

retina

A

back layer of the eyes containing a variety of cells and glia
made up of photoreceptors, RGCs, bipolar cells, horizontal cells, and amacrine cells

3
Q

photoreceptors

A

cells that detect photons and convert them into electrical signals
types: rods and cones
input layer of neurons

4
Q

rods

A

photoreceptors responsible for dim light vision
highly sensitive
one can detect a single photon of light
dispersed more around the eye

5
Q

cones

A

photoreceptors responsible for color vision
three types: S (detects blue light), M (detects green light), and L (detects red light)
located in the fovea (center of the retina)

6
Q

retinal ganglion cells (RGCs)

A

transmit information from the eye to the brain

allow for the establishment of receptive fields