Reception of Stimuli

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What two cells are sensitive to light?
Rods and COnce cells
1 of 24
What doe Cones allow?
colour vision in bright light
2 of 24
What do rod cells allow?
Black and white vision
3 of 24
In rods the molecule is a purplish pigment what is it called?
Rhodopsin
4 of 24
The neurone of the ganglion cell connects to what neurone?
Bipolar neurone
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What vesicles are in the outer membrane?
vesicles, membranes containing photochemical pigments
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Where are the rod and cone cells found?
Outer segment
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What is behind the outer segment?
pigmented epithelium in choroid
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What is behind the pigmented epithelium?
Sclera
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In the dark what diffuses into the outer segment?
Sodium ions
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Through what?
open cation channels
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What then moves down the gradient?
SOdium ions
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What gets pumped out on the inner segment?
Sodium ions actively pumped out
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What is the membrane depolarised to?
-40 mV
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What is released which binds to bipolar cells?
neurotransmitters
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preventing it from?
depolarising
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What is broken down?
Rhodopsin
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What is closed?
Sodium ion channels
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What is actively pumped out?
Sodium ions
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What is hyperpolarised?
membrane
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What isnt released?
Neurotransmitter
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What opens?
Cation channels in and bipolar cells open
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What becomes depolarised?
membrane
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Generating a what?
an action potential in the neurone of the optic nerve
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Other cards in this set

Card 2

Front

What doe Cones allow?

Back

colour vision in bright light

Card 3

Front

What do rod cells allow?

Back

Preview of the front of card 3

Card 4

Front

In rods the molecule is a purplish pigment what is it called?

Back

Preview of the front of card 4

Card 5

Front

The neurone of the ganglion cell connects to what neurone?

Back

Preview of the front of card 5
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