detecting light Flashcards
1
Q
what does the retina in the eye detect?
A
light and contains two types of photoreceptors cells
2
Q
what are the two types of photoreceptors?
A
rods and cones
3
Q
what does retinal combine with?
A
protein, opsin to form photoreceptors
4
Q
what is retinal opsin complex called in rod cells?
A
rhodopsin
5
Q
what does rod cells contain?
A
rhodopsin
6
Q
what does cone cells contain?
A
photospin
7
Q
what does rhodopsin do?
A
detect low levels of light
8
Q
what does photospin do?
A
detect colour vision
9
Q
what events happen when rhodopsin absorbs a photon of light?
A
activation of g proteins
activation of molecules of an enzyme
sufficient product formation is triggered
nerve impulse is generated
