What is Homeostasis? | Physiology | Biology | FuseSchool

What is Homeostasis? | Physiology | Biology | FuseSchool

Homeostasis is a term first defined by Claude Bernard in 1865. It means maintaining a constant internal environment.

Senses all around the body are measuring various things and sending the information back to the brain. The brain then does its best to keep all these things stable and constant to keep the body working properly. Homeostasis is maintaining a constant internal environment.

What kind of things need to be kept constant in the body? It's very important to keep our temperature the same, at around thirty seven degrees Celsius. You can find out more about this in the video on temperature regulation. You also need to keep the levels of sugar in the blood constant along with levels of ions and water. Your blood pressure needs to be carefully monitored along with the amount of waste in the blood such as carbon dioxide and urea.

Let's say one of these factors goes too high or low, what is the brain going to do to get it back to normal levels? The answer to that is negative feedback. Negative feedback is the process whether the brain uses either a hormone or the nervous system to send a signal to the part of the body that can rectify the problem. For example, after you eat a meal with your blood sugar level increases. This is detected, and the pancreas will release a hormone called insulin that causes the sugar to be stored in the liver. The blood sugar level will then return to normal.

Negative feedback is the leap from which the body takes a stimulus, reacts by responding accordingly and brings the body back to the normal levels.

So why is homeostasis so important? Our metabolism, which is all the chemical reactions in our bodies that keep us alive, is controlled by enzymes. These enzymes only work in very specific conditions. If these conditions change, they could stop working and we could die.

Luckily, all of this happens without you having to think about it. If you had to do it yourself, you would have to spend all day and night just trying to keep all these things constant and we'd have no time to doing fun like watch videos of cats on the Internet.

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[viiperbiite]

*Important points* - (Written out for those who can't understand him because of his accent):


0:23: "Homeostasis means maintaining a constant internal environment."


(Visual explanation) 0:31: "Imagine the cockpit of a plane. It is packed full of dials and it is the pilot's job to make sure they all stay in the right place. If any of them change, [the pilot] will correct the plane to keep them in the right place and the plane in the air."


0:42: "This is a bit like how our brain works. Sensors all around the body are measuring various things and sending the information back to the brain."


0:50: "The brain then does it's best to keep all these things stable and constant to keep the body working properly."


0:55: "This is homeostasis; Maintaining a constant internal environment."


1:00: "What kind of things need to be kept constant in the body? It's very important to keep temperature the same at around 37 degrees celsius (around 98.6 Fahrenheit)."


1:11: "Also need to keep the levels of sugar in the blood constant, along with levels of irons(?) (ions?) and water. Blood pressure needs to be carefully monitored along with the amounts of waste in the blood, such as carbon dioxide (CO2) and urea (CH4NO2)."


TBC

[martadominkak]

Going on a marathon of these videos before my exam

[MK]

Subhan Allah Who Created All Of These And Controls It 💛💛🤲🏼

[doesntmatter]

the example which you gave was really satisfying and made me understand fast and better.

[namelessnpc]

Thanks for this. I just did a long online quiz for a class and it was one of those quizes where if you get something wrong, it keeps bringing you back to it until you get it right. I finished the quiz without knowing what homeostasis was at all.

[JaneBeagley]

As someone studying for the GED exam I’m so thankful for videos like this ! Thanks so much

[MILO-unyj]

thank you, I love how you use real-life examples and make it look and sound 10x easier than it is, you help me so much with my test thank you.

[ellielockwood]

definitely explained a lot more what I need to know compared to other videos

[nettiepetty]

Love showing your videos to my students! Concepts are broken down nice and simply, and the drawings/animations are really basic, which I like.
I have to say that the sound is sometimes a bit too soft though and not always great quality.
Another thing is the contrast of colours isn't always clear or the font lines are not thick enough to be seen especially when projected with an overhead projector to a class.

[renthiya]

Teachers will be one of the earliest professionals to be replaced by AI forever because it's clear that classes being conducted by humans are deteriorating in terms of quality and students like me really prefer YouTube over an hour of lecture... Teachers please use these videos to teach 🙏🙏

[saturnus]

This video went from Claude Bernard to a cat playing a piano. Wow!

[MATRIXz]

I'm from iraq and i lovet this great chan

[diontaedaughtry]

Thank you this was very helpful and informative 👍👍

[rosesmanguhig]

I'm currently studying some lessons that might come up in my class when school is back. I'm such a nerd but atleast I'm well prepared lol

[kuniosaiki]

00:51


What the actual hell is that, look how it’s walking

[deblinaghosh]

Is it claud bernerd or Walter cannon? I m confused plz hlp

[franklalic]

Can anyone answer this pls…..

The temperature in a room drops to 65 F causing the heater to turn on. The temperature change is an example of
a. Response
b. Stimulus
c. Effector
d. Receptor
e. Control system

[KING-bttm]

I love how my school charges me $3000 for a semester of tuition and just tells me to watch YouTube videos 🤦‍♂️

[vanessawest]

I have a question. You said that that normal body temperature is 37°C. So, what does it mean if it goes higher or lower.

[alicialopez]

Homeostasis is the consistency of the internal environment.