Physiology Lab Fall 2006 Stark Quiz 3

1. What is the name of the part of the thalamus where vision information is relayed?

lateral geniculate nucleus (body)

2. Give the parameters, roughly, in nanometers, of the visible light spectrum.

400-700

3. What color light does lutein absorb?

blue

4. Not everyone saw the bow tie spinning during the presentation of Haidinger's
Brushes. What were we actually seeing?

macular pigments

5. Name the famous visual pigment associated with rods.

rhodopsin

6. What is the phenomenon called where Drosophila are attracted to the light?

phototaxis

7. Blue (480 nm) light was used to do two different things in the
two respective microscope demonstrations. Tell me one of them.

excite fluorescence in GFP (green fluorescent protein
convert visual pigment (rhodopsin to metarhodopsin

8. The eye adjusts the shape of the lens to keep objects in focus. What is this referred to
as?

accomodation

9. Are rods or cones more active at night, at low levels of light?

rods

10. What exits at our blind spot?

optic nerve

This page was last updated 9/27/06

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