The Thyroid Gland and the Thyroid Hormone (T3 & T4) - Endocrine System

The Thyroid Gland and the Thyroid Hormone (T3 & T4)…Thyroxine…Triiodothyronine, Tetraiodothyronine, Thyroglobulin. Thyroid stimulating hormone, iodide, iodine. Biology lectures for NEET, NEETPG, MCAT, DAT, PLAB, USMLE, NCLEX, COMLEX.
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[@MedicosisPerfectionalis]

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[@MedicosisPerfectionalis]

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[@MedicosisPerfectionalis]

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[@MedicosisPerfectionalis]

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Best video on the thyroid process!

[@MedicosisPerfectionalis]

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Perfect work Keep the amazing work 🤝🏻

[@MedicosisPerfectionalis]

Thank you 😊

[@markhall9007]

So why didn’t you include the liver and kidneys since at least 80% of t4 is converted to t3 there and the other 20% is converted in the kidneys? Thyroid makes t4 but the liver and kidneys have to convert free t4 to active t3 in order for it to work on the pituitary and hypothalamus gland? Just wondering why this step was missed because if you have fatty liver it could effect the conversion of t4 to t3.

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[@MedicosisPerfectionalis]

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[@MedicosisPerfectionalis]

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[@noor_8673]

Isnt thyroid hormone protein anabolic?? I am confused my book says it increases protein synthesis?

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[@MedicosisPerfectionalis]

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[@MedicosisPerfectionalis]

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didn't even noticed the video ended, I'm smiling throughout the video hahaha

[@MedicosisPerfectionalis]

I am so glad to hear this!

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Superb. Unique; A three hour lecture in 15 minutes. Hyperneurosomething. If someone has hypothyroidism - did I spot a possible cause of male hyposexuality lurking in the undergrowth? Even a hint of it? There's another lecture....?

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[@MedicosisPerfectionalis]

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9:43 Functions of Thyroid Hormone

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[@MedicosisPerfectionalis]

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Thank you for explaining all of this, I had no idea you had to avoid certain foods

[@MedicosisPerfectionalis]

Thank you so much for watching!

[@abdullahmohsin9028]

Great video as always. Just wanted to point out that at 12:43 & 13:07 you associated Goiter with Hyperthyroidism only. However, it is also a presentation in Hypothyroidism (Hashimoto's Thyroiditis, Lithium intake, Iodine deficiency etc.)

[@MedicosisPerfectionalis]

You’re correct! Goiter doesn’t have to be hyperthyroidism.

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​@@MedicosisPerfectionalis but it can be?

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:)

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[@MedicosisPerfectionalis]

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Amazing video, love the side jokes😂👏🏻

[@MedicosisPerfectionalis]

Thank you so much!

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What app are you taking notes on? Is it Apple or android?

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[@hiteshbhati1242]

Hey Medicosis why there is diarrhoea in hyperthyroidism because if it stimulates sympathetic then sphincter tone would be very high so it should induce constipation rather than diarrhoea?? @medicosisPerfectionalis

[@MedicosisPerfectionalis]

It’s because hyperthyroidism stimulates gastrointestinal motility.

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YOU ARE THE BEST ONE

[@MedicosisPerfectionalis]

Thank you 😊

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Hhhh so easy so funny , I like your way 😂

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I appreciate you!

[@shehreeze1022]

So I’m a little confused, my Kaplan MCAT text book agrees that T3 and T4 are tyrosine with 3 and 4 iodines attached, BUT they disagree that they are lipid soluble. In fact, the book says that they are water soluble. Who do I listen to?!?

[@shehreeze1022]

So upon further research it seems that T3 and T4 are both classified as peptide hormones but they behave like steroid hormones because they are lipophilic, so they actually do cross the lipid bilayer of cells and bind to an intracellular receptor.

[@thejillykilly]

What does it mean if TSH is low but T3 and T4 are normal?

[@MedicosisPerfectionalis]

I don’t understand! Can you elaborate, please?

[@italianelson4951]

Do you mean secondary hypothyroidism?

[@thejillykilly]

@@MedicosisPerfectionalis the blood test says TSH is low, but others are normal. I think it is considered as secondary hyperthyroidism. What does that actually means.

[@slaygirl2063]

@@thejillykilly factitious thyrotoxicosis?

[@barq4565]

I think he meant subclinical hyperthyroidism

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😂Sooo interesting, funny n easier to understand n remember Thankyou soo much ❤

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God bless you

[@MedicosisPerfectionalis]

You too :)

[@paulsonfrancis-tr3gm]

For hypothyroidism shouldn't the TSH levels be high ? Correct me if I'm wrong.

[@paulsonfrancis-tr3gm]

So should the TRH

[@MedicosisPerfectionalis]

It depends on whether it’s primary, secondary, or tertiary hypothydroidism.

[@paulsonfrancis-tr3gm]

Can u please brief me up with that.

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Thanks a lot

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youre my most favorite medical lecturer here in youtube, thank you for making it fun and high yield! you are amazing 😍 you make me smile while watching, i never smile/laugh while listening to my lecturer in medschool 🫢

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I am honored!

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:)

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Magnifique ✨

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Thank you! Would you please help me by sharing?

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@@MedicosisPerfectionalis of course; all my med school friends will know there's such fun educative video on KZbin ❤️

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thanku

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Thank you 🙏 🙏

[@MedicosisPerfectionalis]

My pleasure 😇

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[@MedicosisPerfectionalis]

Thank you 😊

[@mariapazsarmiento3826]

Hi @Medicosis Perfectionalis, I don't understand why when there's TBG deficiency it presents with low total T4, normal free T4 and normal TSH. Can you explain me please

[@MedicosisPerfectionalis]

Total T4 includes the free T4 (floating in the plasma) and bound T4 (bound to the taxi 🚕, known as TBG). If the number of Taxis (TBG) decrease, the number of taxi passengers (bound T4) will decrease, and therefore the total T4 is reduced. However, a reduction in the number of taxis will have no effect on the persons that walk to their work (free T4), and since the feedback loop (TSH) is based on the response to free T4 (which is normal), the TSH will be normal, because the free T4 is normal! Hope this helps!

[@mariapazsarmiento3826]

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[@MedicosisPerfectionalis]

:)

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My T4 is 12.4 And TSH is 3.5 Is it normal?

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Thank you!!!!

[@MedicosisPerfectionalis]

My pleasure 😇

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[@MedicosisPerfectionalis]

Great 👍

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😂 when explaining hyper thyroid he is very hyper active

[@MedicosisPerfectionalis]

:)

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[@MedicosisPerfectionalis]

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Potatoes are my favorite source of iodine.

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[@MedicosisPerfectionalis]

Happy to help, Julia! I wish you success!

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Love

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Thank you 🙏

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I had my thyroid removed, apparently I have a hypothyroidism.

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I love you

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How old are you? Are you a doctor ?

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