Rods And Cones Flashcards
1
Q
What two receptors are in the retina
A
Rods and cones
2
Q
Rods
A
Black and white
Rhodopsin broken down by light energy
Detect very low light intensity
Many rod cells connect to one sensory neuron - retinal convergence
3
Q
Effect of retinal convergence
A
Low visual acuity
Brain cannot distinguish between separate sources of light
4
Q
Cone cells
A
3 types
Different iodipsin pigment red green blue
All absorb diff wavelengths of light
Iodopsin only broken down when high light intensity- one cone cell one sensory cell
5
Q
Strength of cone cells
A
High visual acuity
Brain able to distinguish separate sources of light due to one cone to one sensory
6
Q
Distribution of rods and cones
A
Unequal
Light focus by fovea recieve high light intensity
Cones = fovea
Rods further away
