Hypersensitivities - Types I, II, III, and IV (Hypersensitivity Reactions)

Biology Professor (Twitter: @DrWhitneyHolden) reviews hypersensitivities, spending a few minutes on each of the four different types of hypersensitivity, including those that are cell-mediated (delayed) and antibody-mediated.
This channel also has a video on TYPE 5 HYPERSENSITIVITY if you want to check it out here: • Type 5 Hypersensitivity

[@jesusistruth.sthazel-adaug3279]

My 70 powerpoints transformed into a 11 mins video. Thank you so much professor.

[@BiologyProfessor]

Happy to help :)

[@kendallphillips3297]

Thank you! This helped a lot to narrow down all of the nitty gritty information into something understandable.

[@michellepellegrini1271]

I am taking Patho right now and found your video and let me just say that you are going to help me remember the 4 types of hypersensitivity. Thank you! This is a great video for visual learners like myself!

[@MD-01]

beautiful video. GOD bless you. the fact that you were able to make it this simple confirms that you actually know the stuff. unlike those complexity loving professors that makes lives of knowledge seekers hell on earth. this lady actually made me love the hypersensitivity reactions

[@daniellakucherina1663]

very straight to the point and simple. thank you!

[@pksaini4781]

Helo?

[@Shindler39]

I hope your life is going well for you Daniella.

[@ak2944]

This was really helpful, thank you so much! I especially liked that the key-words weren't written in, so I could check what I remembered.

[@ferrislkpokpa7867]

The self-confidence is really expressed in your face, that's a sign of a good Teacher.

[@BiologyProfessor]

Thank you! My confidence in my teaching has definitely improved with practice. :)

[@Alimohammed_33]

I agree👌🔥

[@AminMohammadAmini]

I had never seen such a good video before for hypersensitivity

[@rsonlinebiologyclasses7697]

Muhammad bin tuglak.

[@lindseyduncan3574]

Thank you for explaining that so simply. You are a wonderful teacher!

[@sandeepjat6825]

Hi

[@tl8796]

Your presentation is very concise and hit to the point. I love it.

[@Pkedya2boy]

This was very helpful for numerous reasons. My professor never really slowed down to re-iterate the simple things such as "IgG and IgM recognizing antigens on cell surfaces." This really helped to simplify the 4 steps of hypersensitivity and my poor understanding of immunology in general.

[@BiologyProfessor]

Glad to help!

[@BiologyProfessor]

Here’s another immunology video that might help you. It’s over antibody structure and function. czcams.com/video/a-gmb2avW38/video.html

[@jonathanwalker7199]

This was an excellent video. Thanks for an understandable explanation!

[@Danamoss100]

Simplest and best explanation ever. Thank you !!

[@JelvisChristley]

As someone with food allergies and rh reaction as well as diagnosed antiphospholipid antibody syndrome and a type IV expression of erythema nodosum, I wanted to say thank you for helping me to understand what is breaking down. I now understand why my hematologist suggested I undergo experimental immuno suppressive therapy. It gives me more information to make the appropriate decision to move forward or not.
So
Thank You ❤

[@sakthipriyakurmapu9383]

Concise and to the point. Really helpful for a medico! Thank you!

[@Angelxbaby88]

Thank you so much for breaking this down. I am so happy I stumbled across your video.

[@NERVESMEDICINE616]

Thnks

[@mombasasherman]

Clear and straight forward. Much thanks

[@3bdulaziz197]

Thank you for this video, it summarizes a lot of information.

[@NERVESMEDICINE616]

Exactly 👍

[@alismith6978]

Perfect. Shared with my classmates. Thanks

[@rickfearn3663]

Excellent clarity.

[@jonathanbrowne1840]

Great review for studying. Thank you!

[@lcdp9459]

This has been the easiest breakdown for this topic. Thank you! 💜

[@iloveyoutubethaneyouharleq6469]

Thank you! Excellent and well organized lecture.

[@jamilrehman1810]

thank you so very much proff
you actually solved my issue ..

[@financewithsom485]

Love your videos.i have been watching your videos . you really changed a lot

[@BiologyProfessor]

Check out some of the other videos that I just posted today - thanks for watching!

[@ebaasegu9521]

I love the way of your teaching and your acts

[@user-xu8pt6uy8h]

I have been reading it for 3 hours. And then I have found you and you have made everything clear. Thank you my dear ♥️💐♥️♥️

[@trinitywright9577]

Thank you so much! I was struggling with the way my professor explained it. This was very helpful!

[@BiologyProfessor]

I’m glad! Good luck with your studies!

[@mokodin4295]

I would just like to say ... thank you kindly !!!

[@laythalashraf1213]

Nice simple
We need more examples about diseases caused by every type of hypersensitivity

[@mayanksangam9205]

Thank you prof., it's really helpful.

[@jinjinjinba]

Thank you very much for uploading this video!

[@samshrivastava2655]

Excellent and very easy to follow!

[@Army-1pl1og1y]

أخيرا انا فهمت درس hypersensitivity, شكرا لكي حقا❤❤❤❤

[@oe5827]

Really helpful and clear, thank you

[@cansun4379]

Amazing, very easy to understand

[@janakotherova5904]

Brilliant work. Thank you!

[@eja9403]

Thanks a lot! This video was really helpful

[@xeneize2022]

ugh you make it soooo simple! I'll be forever in your debt

[@mercychepkirui1123]

Thanks mum ...I've understood it well ,be blessed

[@beringin90]

Superb , excellent explanation. Really helps. 👍Thank you.

[@aduwamenegbe6327]

Simply explained..thank you 😘

[@maazkhan7950]

Very good explanation

[@chiahsuantsauo8375]

Nice review, thank you

[@tunasandwich2630]

you are an angel for this! thank you so so much!

[@evelynmandal1000]

Thank you so much! You explained this so well. Now I have a better understanding!

[@Quranrecitation.Quranlofi]

I have wasted time hours by hours to understand the hypersensitivity
But this 11 was enough,,,if I would find it
Thank you professor

[@javeriaanwer1403]

splendid explanation thank you mam

[@khez8218]

thank you so much for this wonderful explanation....your pronunciation of the words is super cool..you make it easy to hear and understand the thing fast ❤❤

[@BiologyProfessor]

You're very welcome!

[@constancemwale5964]

Thankyou so much...you are a life saver

[@user-ch9ng3no9m]

Nicely explained THANK YOU BAE 😍

[@AthouPhilip]

Thanks for beautiful explanation...... it was just perfect🤗🥰

[@rose73339]

thanks a lot that was so simple and easy to understand ! ^^

[@yahyaadam3136]

Well presented, excellent!

[@mikedasoccer]

Thank you so much for making these videos. You're an amazing teacher and make science so much easier to understand.💯💯💯

[@BiologyProfessor]

Thank you so much for watching! I really enjoy it and I hope that my love of teaching is easy to see. :)

[@oswardelias8479]

thank you so much i understand simply God bless you

[@lola96272]

Thank you so much beautiful video

[@ahmedabu_alsheikh2121]

Great video .. thanks alot❤️❤️

[@AMR421RA]

This was very helpful. Thanks

[@MrJayPuff]

Great job

[@abdullahidiriyeyusuf3877]

thank you very simple and helpful

[@aimanalikhan2023]

Thank you Mam. It was very helpful and easy to learn

[@technofriend4u587]

Thank You Madam.😃
Only thing you can do(if possible), provide pdf or jpg image of the the last note(s).
Thank you very much again for nice explanation madam.😃
@Biology Professor

[@dv_wild]

Thank you for this very amazing explanation!

[@BiologyProfessor]

You are welcome 🤗

[@bupebwanga66]

Thank you great video😊

[@mivkayla]

Perfect video! Thanks so much

[@BiologyProfessor]

You are very welcome

[@mhamidusman]

great presentation

[@AbdulazizMaiof]

Thank you for the video.

[@soccersbk]

Thanks, great video!

[@devendra5697]

Thanks mam for summrize hypersensitivity

[@nicoletorres6940]

Really good video thank you so much!!

[@Jahan-haider]

Thanks alot mam your lecture and way giving this is very conceptual love mam 😊😊😊

[@HK-ry9rq]

Amazing explaination 😍

[@bakhtawarkhan9547]

Outstanding lecture

[@uroosanoor7437]

You way of speaking is so sweet

[@faisalabedin843]

Wow Mam.. ur vedio helps me lots..

[@mdharbaugh100]

Thank you. Super helpful!!!

[@anuthomas3848]

This makes very easy mam thank u

[@user-nw7oe7dd6t]

Perfect explanation ♥️

[@BiologyProfessor]

Thanks!

[@sharjeelramdani9892]

amazing video

[@dianacastellanos6567]

YES! thank you!

[@slendrmusic]

Excellent

[@mohamedkatri4908]

Thank you for making such an amazing video, super helpful.

[@mubarakdq7090]

Thnkz for helpfull lect like this

[@shadowman7408]

Excellent video, just brilliant. Would Metal allergy and multiple chemical sensitivities and sick building syndrome be Type IV then?

[@InsightfulScience]

Thank you very much!

[@akhilashok3129]

Very useful videos... Thanks a lot

[@BiologyProfessor]

You are very welcome!

[@atpole818]

Thank you !! 🙏🏼

[@fatemhalasfar4057]

THANKS 😊

[@kuruvi2000]

Thanks from Indian student... Thank you madam

[@FaizaRAhmed]

you are amazing. thank you.

[@NotGemFN]

Loved the video....Easy to understand...
Could you do a video on MHC ?

[@BiologyProfessor]

I've added it to my list, thanks!

[@user-yf8hs3ct8i]

thank you teacher

[@kadijajammaz582]

Thank you 💚

[@Dr-Roy]

Very useful.

[@miss_famma]

Thank you so much

[@hofstraabhu]

Great video, very helpful. I have a couple of questions.
1) what causes the "delay" in Type 4 reactions?
2) why do some allergens elicit a Type 1 reaction while others elicit Type 4 reactions?

[@BiologyProfessor]

1) In Type 4 reactions, the delay is caused by the time it takes the immune response to occur. Antigen first has to be taken up, then processed, and then presented by antigen presenting cells. The T helper cells that recognize the antigen are not very numerous in the body and they take some time to arrive. Together, this adds to a bit of delay in immune response.
2) I believe the correct answer is that different kinds of receptors are triggered by different kinds of antigens, resulting in different types of responses.

[@sara-we9ut]

Thank youuuuuuuuuuuu prof I loved u❤️❤️💋

[@coaltigerakhil4534]

Next level 😍

[@BiologyProfessor]

Haha thanks! :)

[@malaysoy6831]

thank u.....very useful...

[@jeetadhvaryu5680]

Thank you mam

[@imadwalikhan]

thank you