Statistics for Vision-2

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Hint	Answer	% Correct
What is the name for the central part of the retina in which there are no rods or blood vessels?	Foveola	100%
What vitamin is retinal a derivative of?	A	0%
What metals cation is believed to be the major mediator in photoreceptor adaptation?	Ca	0%
What molecule is reduced in concentration (in rod cells) when light is present, leading to closure of channels?	cGMP	0%
Which of rods and cones has invaginating lamellae instead of stacked membranous disks?	Cone	0%
What enzyme is inhibited by this cation, that recycles molecules required for recognition of light?	Guanylyl cyclase	0%
When there is more light is there more or less of the cation inside the cell?	Less	0%
What is the catalytically active form of this pigment that arises when absorption of a photon changes the molecule from 11-cis to all-trans retinal?	Metarhodopsin II	0%
For cones what type of cell is used as an alternative pathway so that pigment is rapidly regenerated?	Muller	0%
What part of the retina may appear larger with increased intracranial pressure?	Opitcal disk	0%
What enzyme is used to alter this molecule?	Phosphodiesterase/PDE	0%
What is the name of the disease where someone had no red cones?	Protanopia	0%
Once the pigment is bleached it must be regenerated, this can only occur outside the photoreceptor but where specifically?	Retinal Pigment Epithelium/RPE	0%
Which photopigment is found in rod cells?	Rhodopsin	0%
What is the name for the disease where someone has no blue cones?	Tritanopia	0%