Sensation Of Taste | Taste Pathway - Physiology
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- Опубліковано 7 сер 2024
- Taste is the sensation produced when a substance in the mouth reacts chemically with taste receptor cells located on taste buds in the oral cavity, mostly on the tongue. Taste, along with smell (olfaction) and trigeminal nerve stimulation (registering texture, pain, and temperature), determines flavors of food or other substances. Humans have taste receptors on taste buds (gustatory calyculi) and other areas including the upper surface of the tongue and the epiglottis. The gustatory cortex is responsible for the perception of taste.
The tongue is covered with thousands of small bumps called papillae, which are visible to the naked eye. Within each papilla are hundreds of taste buds.The exception to this is the filiform papillae that do not contain taste buds. There are between 2000 and 5000 taste buds that are located on the back and front of the tongue. Others are located on the roof, sides and back of the mouth, and in the throat. Each taste bud contains 50 to 100 taste receptor cells.
The sensation of taste includes five established basic tastes: sweetness, sourness, saltiness, bitterness, and umami. Scientific experiments have proven that these five tastes exist and are distinct from one another.[citation needed] Taste buds are able to differentiate among different tastes through detecting interaction with different molecules or ions. Sweet, umami, and bitter tastes are triggered by the binding of molecules to G protein-coupled receptors on the cell membranes of taste buds. Saltiness and sourness are perceived when alkali metal or hydrogen ions enter taste buds, respectively.
The basic tastes contribute only partially to the sensation and flavor of food in the mouth-other factors include smell detected by the olfactory epithelium of the nose;[texture, detected through a variety of mechanoreceptors, muscle nerves, etc.; temperature, detected by thermoreceptors; and "coolness" (such as of menthol) and "hotness" (pungency), through chemesthesis.
As taste senses both harmful and beneficial things, all basic tastes are classified as either aversive or appetitive, depending upon the effect the things they sense have on our bodies. Sweetness helps to identify energy-rich foods, while bitterness serves as a warning sign of poisons.
Among humans, taste perception begins to fade around 50 years of age because of loss of tongue papillae and a general decrease in saliva production. Humans can also have distortion of tastes through dysgeusia. Not all mammals share the same taste senses: some rodents can taste starch (which humans cannot), cats cannot taste sweetness but can taste ATP, and several other carnivores including hyenas, dolphins, and sea lions, have lost the ability to sense up to four of their ancestral five taste senses
Really precise and informative.... Really enjoyed... Thanks a lot
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You just clarify everything in just one page. Thats amazing thanks mam !
Really very Informative
Lingual N is a brach of mandibular N aka CN V3 not facial N .
Anterior 2/3 of tongue has double sensory supply
-Lingual N (V3) - > general sensory( Temp /touch )
- Facial N special fiber through Corda tampani --> sensory taste info
I really enjoyed it ,thank you.
thank you mam nice presentation , understood the topic well
The best thing is You really speak on the point... Not a single micron deviated!!! 😍💫❤..I really love your teaching... It's literally like.. Come medicos😂... Don't worry Here's your shield for exam storm!!! 😅🤭..yes ma'am Also.. Foliate papillae are present.. If I'm not wrong?
Yes
They are not mentioned in essentialls of medical physiology by k sembulingam 😒
Nicely explained mam* in a very concise way
Fantastic 😍
Awesome explanation mam..tq mam..mam in Lpr book it is mentioned that 2nd oreder neurons cross to opposite side and ends in contralateral ventroposteromedial nucleus of thalamus
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Okay..
very well explained😍
please make videos on CNS topic 🙏
Thank you,this is very nice
I'm glad you like it😊❤
Thanks you ma'am 🙏
amaizing taste of u r first video thsnks mam🥰
Most welcome 😊
Thank you so much
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Subscribed very nice
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Excellent
Thank you, kéep watching ❤️
Thank you🙏🙏
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Thanks ma'am
shouldnt it be tempral lobe (insula). you have mentioned parietal lobe in the diagram?
Mam your videos are easily understood mam
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Thanks♥️😌
Tq mam for clear explanation
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I guess ur videos r just awesome
Thank you..😊
@@Dr.KareemaTabassum subscribe b karliya☺️
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Tongue ka easy flowchart pathway bana kar daaliye mam
👍👍😊
Please describe some more pathways
Sure 😊
Thanku you maam
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Mam notes kahape milegi..plz reply fast..🥺
Wow
I want buy the book u are using can u put the link of it plzzzzzzz
Reply plz
Hey,
The book I used in that video is sembulimgam.
Here's the link to buy it online :
www.amazon.in/dp/9352706927/ref=cm_sw_r_cp_apa_fabt1_dlC_.C2QFbX5SHYP1
And here's the online free pdf link :
archive.org/details/KSembulingamEssentialsOfMedicalPhysiology6thEdition/page/n359/mode/1up
Thank you 😊
@@Dr.KareemaTabassum I am asking the notebook link but thank you 🙂
You want my notes?
@@Dr.KareemaTabassum yaa
Nice effort but do it in little brighter environment.
Thank you 😊 will look through it!
Boot bada Aya, apni brightness Kam karrle
Im thee only one who taste more in sweet reception than the rest, why is that?
tq mam❤
You're welcome keep watching❤
I guess the axons of second order neurons crosses the midline.
But filliform are highest and circumvallate are least in number.isn't it??
Yes yes
That is the number of papillae. Here, we are referring to number of taste buds per papilla
K sembulingham book
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Mam Hindi
Mam zbrdast but plz explain into Urdu ...
Fantastic 😍