Get to know Homeostasis

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Homeostasis can be interpreted as a consistent or fixed resistance or mechanism of dynamic equilibrium environment in the organism’s body. In other words the body will strive for ways and have its own mechanism so that our bodies are always in a state of constant and stable in the best conditions for life.

Homeostasis is one of the most important concepts in biology. There are 2 types of constant or steady state in homeostasis, namely:

Closed system – Static balance
In an unchanging state like a closed bottle. Like when we have a bone fracture, the body performs homeostasis by repairing damaged cells and increasing the number and returning to its original state. There is no addition of bone-forming substances when optimal shape has been reached.
Open system – Dynamic balance
Where conditions are constant even though the system is constantly changing, for example, like a pond at the bottom of a waterfall (the volume of the pool will remain even though the water is always increasing). As we discussed earlier, for example our body has decreased pH to an acidic state, so the body naturally with an alkaline buffer increases it to create a balanced body pH. Likewise, when we eat our blood sugar will rise, the body performs homeostasis by releasing insulin so that our blood sugar is stable in the normal range. So also happens when the body is mostly water, then naturally we will urinate a lot.

Environmental changes

Small changes in the dynamic environment in the body can cause cells to die. Examples that will cause cells to die even in small amounts are as follows:

Dehydration – Less water

dehydration can be caused due to lack of drinking, exercising or overheating, it could also be due to certain diseases such as diarrhea, bleeding, dengue fever, etc.

Lack of food

food intake that we eat is insufficient or indeed because it deliberately reduces eating. This triggers the body to carry out mechanisms to create homeostasis

The remaining toxins are collected in the body

not only poisoning, stale food, unhygienic or overeating can cause an increase in toxins in the body. Naturally through the kidney organs, these toxic substances are absorbed and then excreted in urine. But sometimes there are also many toxic substances that cannot be filtered by the kidneys, so other mechanisms are needed.

The temperature changes suddenly

most often is when after doing activities and immediately take a shower, some time the body feels uncomfortable, it is the body’s natural response to homeostasis, even if no sudden temperature changes are reached causing us pain.

the above conditions cause the body to experience problems, and naturally the body uses mechanisms to re-create homeostasis. But when homeostasis is not created, help and other efforts are needed. Starting from the easiest way is to meet the needs of water with water that contains antioxidants, has a small particle size to be easily absorbed by the body and is alkaline, to an even heavier effort that is taking care and treatment in health services.


Each factor has a certain amount that can affect the dynamic environment. Examples of several factors in liquids that need to be regulated in amount:

pH – 7,3 – 7,4, pH is different in certain places.
Temperature – 37oC – 39oC
Glucose – 4.4 – 5.5 mmol / dm3
Urea – 3.3 – 6.6 mmol / dm3

When the values ‚Äč‚Äčabove experience changes either decrease or increase, the body will use a mechanism to rebalance it. When homeostasis is difficult to be created, it means that our body has decreased due to illness or due to aging. That is where the body needs other assistance, for example from drugs, food, for example compress treatment for a fever, or repair the liquid we drink with good water.

Systems and Organs

Although small changes in the amount or level causes an imbalance. this will cause problems for organisms that are always in an uncertain environment (disease, weather, pollution, etc.) and include an unhealthy way of life. So, to adapt to this change, God has created certain organs in the organism’s body to balance, regulate, stabilize, adjust, and continue the environment in order to be in a stable state for cells to continue living and function optimally.

Some functions in the organ system are:

  • Enabling organisms to adapt to external environments that have a wider number and habitat.
  • Provides a stable (dynamic environment within the organism’s body) so cells can carry out life efficiently.
  • Allows metabolic levels to be regulated efficiently at certain times.
    Enabling enzymes to function optimally.


This mechanism is regulated by the brain, especially the hypothalamus, which when stimulated will stimulate body coordination. This process will occur continuously until the dynamic environment in the body will be at a normal amount. So much so that God Almighty created our body along with its mechanism so that we could survive.

The 2 coordinating bodies involved are:

  • Chemical coordination – Like hormones
  • Nerve coordination – Like nerve impulses

Some of the processes involved are:

Positive feedback – For example fever, the body will get hotter to kill bacteria and viruses.
Negative feedback – Example of a state of heat, the body will be arranged to reduce body heat.

A brief example of homeostasis is

  • When the weather is hot, the skin system will respond by removing sweat from the sweat glands in the epidermis of the skin to prevent the temperature of the blood from rising, blood vessels will expand to release heat to the surroundings, this also causes the skin to turn red.
  • If the glucose level in the blood has been used up or decreased from a certain amount, the liver will be stimulated by insulin to convert glycogen to glucose so that it can be used as energy for muscle contraction.
  • When we eat, the acidity of the body will increase, through the alkaline buffer the body will return to the optimal pH.
  • If the salt level increases, the blood will absorb water in every cell causing our body to be less fluid, and vice versa if the lack of salt is our body which will be excess water so that it collects under the skin and then excreted through sweat or urine.
  • And of course there are many more body automations (body compensation) to create homeostasis. Of course, requires the addition of other insights from other library sources as well.

We can conclude that homeostasis is a balanced and optimal state for the body, when changes occur in the body then the body will naturally respond to these changes through a mechanism to re-create homeostasis. The body’s ability to achieve homeostasis must be maintained with good food, enough drinking water, a healthy lifestyle, exercise, and enough rest. Except because of age, the ability will decrease naturally.

the easiest way to help the homeostasis process is:

why drink water? because our body 70-80% is made up of water, then by dealing with our water we basically overcome 80% of our health problems. Of course good water is water that is tasteless, smelly and colorless. But not only that, good water (good water) is not just water just like that (just water) but it must be water that can help improve our health. Good water either naturally or obtained because the ionization process has a characteristic that is alkaline, contains antioxidants and has small particles.


Fajar Bakti Science Course (Publisher Dawn Bakti) (008974-T) – 1999 – Biology STPM Volume 1 by Peter Chen translation by Liew Shee Leong and Lim Peng Lai – ISDN 967-65-0658-3
SASBADI (139288-X) – 2004 – Masters of SPS Biology Study in Level 4 and 5 by Mah Chee Wai, Dr. Tina Lim Swee Kim, and Nazar Shaarani – ISDN 983-59-2090-7
‘K’ Publishing (144639) – 2004 – KBSM Biology Level 5 by Zolkofli bin Awang, Nurul Uyun bint Abdullah, Norma bint Ismail, Fathiah bint Mansoor, and Mohd. Nazri bin Md. Saad – ISDN 983-852-379-8
Hiromi Shinya. (2007). The Enzyme Factor. San Francisco: Council Oak Books. ISBN 1-57178-209-5.

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