Peripheral chemoreceptors | Respiratory system physiology | NCLEX-RN | Khan Academy
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- Опубликовано: 7 фев 2025
- Find out how the your body uses special cells that are peripheral to the brain (outside the brain) to sense levels of O2, CO2, and pH. Rishi is a pediatric infectious disease physician and works at Khan Academy. These videos do not provide medical advice and are for informational purposes only. The videos are not intended to be a substitute for professional medical advice, diagnosis or treatment. Always seek the advice of a qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read or seen in any Khan Academy video. Created by Rishi Desai.
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I really love your lectures and want to listen to them all the time , May Allah bless you
🎯 Key Takeaways for quick navigation:
01:29 🩸 *Baroreceptors in carotid sinus and aortic arch detect pressure changes, regulating blood pressure.*
02:26 🤔 *Chemoreceptors in aortic body and carotid body sense oxygen, carbon dioxide, and blood pH levels.*
04:23 💧 *Carotid body receives high blood flow, around 2 liters per minute per 100 grams of tissue.*
06:20 ⚡️ *Glomus cells in chemoreceptors detect low oxygen levels, depolarize, and release neurotransmitters for signaling.*
07:45 🔄 *Glomus cells also respond to rising carbon dioxide levels, leading to increased neurotransmitter release.*
09:43 🧠 *Glomus cells and neurons share a common ancestor cell from the neuroectoderm during fetal development.*
10:42 🌐 *Vagus nerve (cranial nerve 10) and glossopharyngeal nerve (cranial nerve 9) transmit chemoreceptor information from outside the brain to the central nervous system.*
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Thanks! The video is amazing. You teach better than my professor
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I was looking for this video the other day and now you have it!!! Awesome. Thank you.
Fantastic video again. Very well presented!
Excellent video!
Mash Allah, very helpful content.Thank you.
but the story must continue. Where do the signals go once they reach the vagus nerve and the glossopharyngeal nerve?
The action potentials derived within the peripheral chemoreceptors end up stimulating respiratory centres within the upper medulla and pons. When hypoxia is detected dorsal and ventral respiratory groups within the medulla are stimulated leading to activation of the internal and external intercostal muscles and thus an increase in ventilation. This increase in breathing resolves the hypoxia via the partial pressure of oxygen rising. Once oxygen levels are at an adequate level within the blood, the peripheral chemoreceptors will no longer detect a need to generate action potentials meaning the increased ventilation will cease and return to normal resting levels.
@@excalibur9768 but what will the effect on the cardiovascular system be tho?
Great Videos of the Chemoreceptors! I am a visual learner and this is excellent! It helped build on my incomplete thoughts. haha
Amazing🧡
Thanks Rishi ❤️
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You make me see the big picture. Thanks a lot!
Aaron Iding you too, man
thankyou!👍
I understand so much better when watching your videos, Thank you!!!
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I learned a lot and I also find it reaaaally really cute hahahah idk why. Thank you!!
Very helpful. Thanks.
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Excellent 👍
Is there a place that shows source material for this/these videos? I'd like to read those to possibly learn more. @khanacademymedicine
adipoli macha
Well done Rishi. The zoom ins were helpful and engaging.
Thank you!
Wonderful, superb and visually stimulating lessons. Only wish I found you sooner for nursing school
Are you a nurse now?
really helpful thank you!
What are the neurotransmitters that the glomus cell ‘dumps out’
How does the vagus nerve help with increasing respiration when it is a parasympathetic nerve?
Still wondering......
Likely ACh or Dopamine; as far as increasing respiration, the function of the chemoreceptors is separate from the autonomic nervous system. While the vagus carries the autonomic PSNS fibers, it carries many other fibers as well. Remember, the vagus nerve also provides motor innervation to some of the intrinsic muscles in the neck. Just because it has PSNS activity doesn't make that its only function. Any "nerve" is just a carrier for thousands of fibers. In this example, the chemoreceptor nerves travel through the vagus if aortic, or the glossopharyngeal if carotid. Try not to get stuck on the idea that a named nerve has only 1 type of nervous function. Hope this helps!
But how the brain regulate the bp according to hypoxia ? Dose it cause increase or decrease in heart rate ? I’m so confused in that point , if any one can explain please ?
Did you get an answer, 3 years after? 😅 If yes, can you explain me please
@@louisecoyac8825 same
Nice video, Rishi :)
Love it!
Really weird I go to school receptors. I come home log in to youtube suprise receptors hahaha
Good , hello mr khan can you teach ultrasound physics, which too many physics formula . Will be appreciated thNks
better if you gonna use real images from the source you took this information. otherwise , interesting!
i think they take the info. to the spinal bulb, to be more precise. am i wrong?
Thank u so much for the video. It's very helpful....:))
Don't write gm for gram, just write g. Other than that, awesome video!
can you please make a video on hypoxic drive, or Co2 retainers
u r awesome
thaaaaaaaaaaaaaaanx U ! :D
Vidoe is with good explanation but black background isn't better white give better look
what is the effects of this ? its causes to what ?
Thank yo-yo, so is it safe to say the aortic body is located on the aortic arch or the capillary ends of the aortic arch??
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You thought I would say thank you? hAh!
amazing! thank you