the eye

Question 1

what are transducers

Answer 1

convert light energy into electrical energy or nerve impulses

Question 2

in terms of visuals how do rod cells differ from cone cells

Answer 2

rod cells cannot differ between wave lengths meaning they only see in black and white
rod cells have a lower visual accuity
can see in low light intensity

Question 3

what light intensity can rod cells see and why

Answer 3

low light intensity as they share a single sensory neuron

Question 4

how many types of cone cells are there

Answer 4

three

Question 5

why are there three types of cone cells

Answer 5

respond to different wave lengths of light
red
green
blue

Question 6

what type of light intensity do cone cells have and why

Answer 6

high light intensity as each cone cell has its own bipolar cell connected to a sensory neuron

Question 7

what is the pigment in cone cells

Answer 7

iodoptin

Question 8

give the features of the rod cell

Answer 8

• many more rod cells to cone cells
• multiple rod cells to one bipolar neurone
• see in low light intensity
• see in black and white
• low visual accuity

Question 9

how is an action potential generated from a rod cell so we can see

Answer 9

• multiple rod cells to one bipolar neurone
• spatial summation
• rhodopsin is broken down by light
• if enough ridopsin is broken down action potential can be generated