Rods & Cones Flashcards
1
Q
Rods have what type of excitation threshold and therefore are used in what type of conditions?
A
Low Excitation threshold
–dim conditions
2
Q
Cones have what type of excitation threshold and therefore are used in what type of conditions?
A
High Excitation threshold
—High light conditions
3
Q
What photoreceptor is characterized with poor acuity? High acuity?
A
Rods- poor acuity
Cones- high acuity
4
Q
The ability to distinguish color is due to the presence of what?
A
Three separate cone populations, blue, green, red
5
Q
Perception of colors other than blue, green, red is due to what?
A
relative excitation of the different populations of cones
6
Q
Colorblindness is the result of what?
A
The absence of one or more of the cone populations
