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Summary Photo transduction learning sheet
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Summary of 12 pages for the course Biologie at Gymnasium (Study sheet)
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Hauttypen ,Stäbchen Zapfen Blindefleck -
keine Lichtsinneszellen
,
Auge >
-
phototransduction
and
light enters the back of an eye somehow
through a set of steps gets
converted into neural
impulse
impulse sent to the brain-sense of an info
gets
·
retina :
made of a bunch of different cells
↳ two main :
rodes and cones
RODES :
as soon as
light is presented to him-takes that
light and then
converts it into a neural impulse
normally turned on (also no
light
·
:
light present turns him off
- :
now ?
occurs through phototransduction cascade
↳ the set of at
steps that occurs the molecularlvI . that
takes the rod and turns him off
in turning him off ,
he's
actually able to turn on a bunch
of other cells that eventually lets the brain know
hey there's
; ,
light her2
=allows the brain to realize there is
light + to comperhend
what's
going on t make sense of the world
examine phototransduction cascade
-mus
very top of the rod S
I
- ...
8
E
-
·
inside of a rod-buch of little disks
↳
thin little disks + stacked on top of one another /100 of them"
↳ fill
up the entire rod (same in cones
inside of these disks-whole bunch of different proteins all interspersed
·
disks
throughout the
↳ (consists submits
protein- bigger-multimeric protein of a bunch of different
-7 submits- make up this little
protein
=> modopsin-bes its in a rod
-
cone-conopsin /the same protein
, t
-
rhodopsin
wi
> transchein
↳ as soon as retinal changes shape and causes rhodopsin to change shape ,
transducir
breaks away from rhodopsin
comes to another part of the disk and binds to a protein
↳ <
submit
-
=> phosphodiesterase
PDE
#
>
protein-1 called => Cyclic GMP phosphodiesterase
or PDE- Short
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