Special Senses | Photoreceptors | Rods and Cones

Ninja Nerds!

During this lecture Professor Zach Murphy will be teaching you about the mechanism of photoreceptors. We go into great detail on the rods and cones, and how they respond differently to various types of light. Finally, we discuss how we adapt from a light to dark environment, to a dark to light environment, and how these photoreceptors respond. We hope you enjoy this lecture and be sure to support us below!

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[himanshuambilkar]

Photoreceptors-
Rods-
Rhodopsin
Retinal sensitivity
Scotopic vision.
Cones-
Photospin
Visual acuity
Colour Vision.

Dark to light adaptation-
Pupil constrict
Bleaching pigment
Rods turns off
Retinal sensitivity decrease
Cones turns on
Colour Vision
5-10 minutes.

Light to dark adaptation-
Pupil dilation
Rhodopsin start accumulating
Retinal sensitivity increase
Rods turn on
Low wavelength not activate cones
20-30 minutes.

Colour blindness
Nyctalopia
Night blindnesses
Retinitis pigmentosum.

Thank you sir

[Light-qnzh]

Really I’m so happy because we live in same time ♥️

[AstridDarinka]

Now these are the type of people that are meant to do this job!! Thank you so much, taught me so much more than my university professor ❤️

[bushraaqeel]

You are my real Professor!!!for all of my med school.i m glad i found this channel in my first year ❤

[jennafairhaven]

Wish I had found you at the beginning of this semester.

[kumargauravsingh]

What would I have done without you man ?
You're simply awesome.🙏

[johnnywalkervip]

Wow thank you so much, this video helped me get a better idea what my professor was explaining in class. ✔✔👍

[yarom]

i really appericiate you making this informative video. one of if not the best one i've ever seen on this subject

[hamdiscorner]

I never understood why pupils constrict in bright light before this video. Thanks Zack, stay blessed and continue helping doctors around the world 😍

[solwane]

if only i found out about this channel since year 1 med school wasted 6 years now graduated and this helps review for usmle exam, thank you brilliant doc and teacher

[ELFCloudGamer]

I have to tell you I have spent the whole day watching your videos haha, can't believe I only discovered them today

[its.morrissey_xx]

Im a first year optom student and this was so helpful in prep for my exam! Thank you! My a level biology teacher reccomended your channel and its amazing I can still find videos here not only covering a level but university content too!

[albeezhuang]

I love it. Excellent drawing and explanation. It draws all the points together that helps me understand the whole process. Very good job!

[CebolwethuMawelele]

Finally made sense of my notes my lecturer gave .This is awesome

[dorothybonsu]

This video was the best video in explaining this process. Thank you much for making

[tiffanymyat]

Thank you very It is truly amazing that you can condense all these information in this one video!

[davidaminov]

"Oh man you know what? spiderman movie was so great! I wanna go back in again, and watch it again" 15:48 #Visual_adaptation
Zach you are the B-E-S-T!

[abazaabdelmageid]

You're more than perfect 👌. Thanks for your excellent and brilliant explanation 👏

[kavitakar]

Excellent. Your grasp on the subject and teaching is just fab.

[poosmi]

you're actually clutch for this one