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Chapter 42
Signal Transduction in the Eye
7
Biology
Undergraduate 1
04/11/2010

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Term
1
Definition
Light strikes rhodopsin in rod cells:
-retinal portion changes shape
-initiates signal transduction involving trasducin
Term
2
Definition
G protein(transducin) activates esterase that hydrolyzes cGMP reducing its concentration
Term
3
Definition
Ion channels close
-membrane becomes hyperpolarized
Term
4
Definition
Rod cells release less glutamate
-fewer signals transmitted
Term
5
Definition
Bipolar cells become depolarized
-release neurotransmitter that stimulates ganglion cells
Term
6
Definition
Axons of ganglion cells(optic nerves) transmit info to lateral geniculate nuclei in thalamus
Term
7
Definition
Neurons project to primary visual cortex and integration centers in cerebral cortex
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