rods and cones Flashcards
how are rods and cones transducers
the convert light energy into electrical energy
what can rod cells lead us to see only black and white
they cannot distinguish between different wavelengths of light
how many numbers of rod cells are there
many
how are the rod cells arranged
many rod cones connected to a single bipolar neurone
what is the purpose of rod cells
to detect light in low intensity
why can it function in low intensity
as many rod cones connected to one bipolar neurone so more easier to reach the threashold producucing a generator potential
in order to make a generator potential what must happen
the rhodopsin must be broken down
how is rhodopsin adapted
it can be broken down in low light levels
why do we have low visual acuity
the rods are not seperated and connected to one bipolar neurone so we cannot distinguish between different sources of light
what do the different type of cone cells do
the three types detect differnt wavelengths of light so we can identify color
whta is its stucture like
6 million each connected to its own bipolar sensory neurone
what does this mean in terms of threashold
high light intensity is needed to exceed threashold and generate a potential
how is iodopsin adapted
different iodopsin based on the wavelength and requires high light energy to break it down
where are most of the cones found
in the centre of the fovea
why is it found here
this is where most of the light is focused
