The phototransduction cascade | Processing the Environment | MCAT | Khan Academy

This explains phototransduction cascade which is critical to our sense of vision. By Ronald Sahyouni. Created by Ronald Sahyouni.
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[@MrPridizzle]

Thank goodness for 1.75x playback speed.....

[@MsChaosbutterfly]

One error: These cells do not produce action potentials. (Neither do bipolar cells.)

[@NicMNeves]

hey, i'd like to amend what you said about the naming of the bipolar cells, its actually not "bipolar" because it's on or off, its actually referencing the structure of the cell (it has two poles). This differentiates it from a unipolar cell, which is like a rod with only a single pole, transmitting a signal in 1 direction.

[@suhheecook4910]

PhD student in biomedical engineering taking my last qualifying course ever... medical physiology. you're saving my life!

[@txaitxaitxai]

the name "rhodopsin" is actually coming from the latin for "red" (rhodo-) not because it's in the rods. That's just a way to remember it.

[@stevenk113]

The 11-cis conformation drawing is a little misleading. The branch should be angled downward after carbon 11 to indicate it being "bent"

[@_adi_dev_]

Rhodopsin isn't named for what type of cell its in, it was named for its colour

[@yaytheo3289]

Really nice explanation, but the rod does not hyperpolarise only due to the Na channels being blocked, but also due to K channels remaining open and pumping K outside the cell. Other than that, great! ;)

[@smileki89]

do the same happen for the cones?

[@user-iu7yu6us7i]

Like this can you explain what happens in cone cell

[@katharinalysy1518]

"We'll just give it kind of a neutral face because it's ... bipolar." :'D

[@casslovesyhuu]

This was such a great help! My physiology lecturer literally had no idea when he was teaching me this... Thank you! :)

[@sofiab3829]

You made this more clear than more neurophysiology teacher in optometry school! Thanks a ton

[@JealousyIsMadness]

Thank you!!!!! I'm trying to absorb information for my Neuro final, this was super helpful

[@lensmaticoptical4083]

Millions of claps for you Sir. You are a real teacher..... Thank you

[@offsp25]

Good presentation... i have more understanding point from you. Thank you.

[@marianahozahoza6496]

With khanAcademy it feels like I found a treasure . 🗽 Thx a lot !

[@S_a_Z_m]

Best part

[@BenBezpark]

Thanks so much for the video. Was a great help glad to have you around :)

[@fatimah9815]

Great Video and very clear explanations! Thank you very much