Flashcards in Physiology of the Retina Deck (36):
The chemical found in RODS is _____________.
In regard to RODS ,when struck by light RHODOPSIN breaks down into _________ and ________.
In regards to RODS, with further light exposure, RETNENE is converted to __________.
In regards to RODS, the conversion of RETINENE to VITAMIN A is a ____________ reaction.
In regards to RODS, in the DARK, OPSIN TRAPS ________ and it is CONVERTED to _________.
In regards to RODS, the process where OPSIN TRAPS VITAMIN A and CONVERTS IT TO RETINENE is a ___________ reaction.
In regards to RODS, with FURTHER EXPOSURE to DARK, RETINENE and OPSIN spontaneously RECOMBINE and form ____________.
In regards to RODS, when RETINENE and OPSIN recombine to FORM RHODOPSIN, the reaction ______________ and can be utilized to convert more __________ to _________.
The chemical found in CONES is __________.
In regards to CONES, when struck by LIGHT, IODOPSIN breaks down into ____________ and __________.
In regards to CONES, with FURTHER EXPOSURE to LIGHT, RETNENE is CONVERTED into __________.
In regards to CONES, when RETINENE is converted into VITAMIN A it is a ___________ reaction.
In regards to CONES, in the DARK, OPSIN traps __________ and converts it to ___________.
In regards to CONES, when OPSIN converts VITAMIN A into RETINENE it is a _________ reaction.
In regards to CONES, with FURTHER EXPOSURE TO DARK, RETINENE and OPSIN spontaneously recombine and form __________.
In regards to CONES, when RETINENE and OPSIN form IODOPSIN, the reaction liberates _________ utilized to convert ________ to RETINENE.
In MIXED EYES containing both RODS and CONES, the _________ usually outnumber the __________.
RODS outnumber the CONES
*Fig 6.9 p. 139*
In what THREE (3) ways do RHODOPSIN and IODOPSIN DIFFER?
1.) IODOPSIN RESYNTHESIZES from retinene and opsin at a much more RAPID rate.
2.) The SPECTRAL ABSORPTION CURVES are different.
3.) The OPSINS of the two are DIFFERENT.
The OPSIN of RHODOPSIN is called __________.
The opsin of IODOPSIN is called ___________.
True or False: all chemical substances absorb light in the same degree in different parts of the visible spectrum.
FALSE, they absorb light in VARYING degrees.
The peak of SPECTRAL SENSITIVITY for RHODOPSIN is around ___________.
The peak of SPECTRAL SENSITIVITY for IODOPSIN is around ___________.
Utilizing the ___________ technique, it is possible to measure activity of individual GANGLION CELLS.
What are the TWO (2) kind of UNITS associated with GANGLION CELLS?
These UNITS of GANGLION CELLS have BROAD spectral sensitivity.
These UNITS of GANGLION CELLS have a NARROW spectral sensitivity and only respond in a RESTRICTED part of the visible spectrum.
What are the TWO (2) types of DOMINATORS?
SCOTOPIC DOMINATORS have a peak of SPECTRAL SENSITIVITY around ___________.
PHOTOPIC DOMINATORS have a peak SPECTRAL SENSITIVITY around ___________.
What are the FOUR (4) MODULATORS?
BLUE MODULATORS = ____________ millimicrons.
GREEN MODULATORS = ____________ millimicrons.
YELLOW MODULATORS = ____________ millimicrons.
RED MODULATORS = ____________ millimicrons.