Have you ever felt a sudden surge of fear or panic? Or do you feel like you have a sudden surge of strength when you are under a lot of stress? You may have seen people do amazing things when they are in a state of emergency. Behind all of this are two small, triangular glands located above your kidneys. We call these the adrenal glands . Some people also call them the adrenal glands. Although they may be small in name, their work is not small at all. These two little heroes control many of the daily functions of our body. So, today we will talk about these small but very important adrenal glands.
What exactly are the adrenal glands?
Simply put, the adrenal glands are two small, cap-like glands located on top of our kidneys . They are part of our body's endocrine system.
Now you may be wondering what the endocrine system is. Imagine that there is a large communication network inside our body. In various places in this network, there are glands that are like little factories. These factories make special messengers and release them into the blood. These messengers travel through the blood throughout the body and tell various organs what to do and when to do it. We call those messengers hormones .
So, this entire communication network, that is, all these glands and hormones together, we call it the endocrine system. Other glands that belong to this system are:
- Hypothalamus
- Pituitary gland
- Thyroid gland
- Pancreas
- Women's ovaries
- Male testicles (Testes)
All of these glands work together like a well-functioning team, controlling many things in our bodies. The adrenal glands are a very important member of this team.
What service do these small glands provide to our bodies?
The adrenal glands produce several types of hormones that are essential to our lives. Each of these hormones has a different function. Let's look at the main hormones and what they do.
| Hormone | Simply its function |
|---|---|
| Cortisol | This is what we call the "stress hormone." When we feel a lot of stress, whether mental or physical, this hormone gives us the strength to cope. Not only that, but it also controls how we use the fats, proteins, and carbohydrates in the food we eat, reduces inflammation in the body, controls blood pressure, increases blood sugar levels, and helps regulate our sleep and wakefulness. |
| Aldosterone | It's like a manager who balances our body's pressure, salt, and water. This hormone is very important for controlling the levels of sodium and potassium (electrolytes) in our blood and keeping blood pressure at the right level. |
| DHEA and Androgenic Steroids | These are known as weak male hormones. Although they do not have a direct effect, they are converted into female hormones (estrogens) in the ovaries of women and into male hormones (androgens) in the testicles of men. |
| Adrenaline and Noradrenaline | These are called "fight or flight" hormones. Imagine that you are walking down the street and suddenly a dog attacks you. At that moment, your heart beats faster, your body feels the urge to run, and your eyes widen, right? These two hormones prepare you for that emergency. They increase your heart rate, increase blood flow to the brain and muscles, and help you use blood sugar. |
Simply put, the adrenal glands are directly involved in many things, including your body's pressure, salt and water balance, how you cope with stress, how you use energy, and the development of sexual characteristics.
Do the adrenal glands do this work alone?
No. The adrenal glands are not autonomous entities. They receive instructions from control centers in the brain.
This is like a big company.
- Chief Executive Officer (CEO): The brainThe hypothalamus is the CEO. It is the one that understands the situation and sends out a message.
- Manager: The Manager is the pituitary gland in the brain. When he gets a message from the CEO, he is the one who tells the adrenal glands, "Okay, start working now."
- Worker: The adrenal gland is the one that produces the relevant hormones (e.g. cortisol) and releases them into the blood, as directed by the manager.
This is how the system works. Also, the adrenal glands decide how much aldosterone hormone to make based on signals from the kidneys. This means that all of these are connected together to maintain balance in the body.
How is the inside of the adrenal gland formed?
Although the adrenal gland looks like one thing from the outside, it has two main parts. It's like a small fruit. The outer part and the inner part are different.
1. Cortex - Outer part: This is the largest part of the gland. It resembles the skin and pith of a fruit. This outer part produces steroid hormones like cortisol and aldosterone.
2. Medulla - The inner part: This is the innermost part of the gland. It's like the pit of a fruit. The "fight or flight" hormones adrenaline and noradrenaline are made in this inner part.
The types of hormones produced by these two parts and their functions are completely different.
Is it possible to live without adrenal glands?
This is a question that many people have. Hormones like cortisol, which are produced by the adrenal glands, are essential to our lives. However, due to certain medical conditions (e.g. cancer), there are times when both adrenal glands need to be surgically removed (adrenalectomy).
If that happens, that person will have to take those hormones externally as medicine for the rest of their life . If they take those hormones properly, they can live a normal life. Therefore, even without the glands, they cannot live without their hormones.
Can adrenal gland diseases occur?
Yes. Like any other organ, there are several medical conditions that can affect the adrenal glands. These problems mainly occur for two reasons:
- Overproduction of hormones: If the gland becomes overactive and produces more hormones than necessary.
- Underproduction of hormones: If the gland is not able to produce the required amount of hormones, either due to damage or for some other reason.
There are several reasons why these situations may occur:
- Genetic mutations
- Autoimmune diseases - This means that our body's own defense system attacks the adrenal glands.
- Formation of tumors.
- Damage to the glands due to an accident, infection, or bleeding.
- A problem with the hypothalamus or pituitary gland in the brain. (Remember, if the Manager has a problem, the Worker cannot work properly.)
- Long-term use of certain steroid medications.
Some of the main medical conditions are:
- Addison's disease: This is a condition in which the hormones cortisol and aldosterone are not produced in sufficient amounts. This is often caused by a problem with the immune system.
- Cushing's syndrome: This is a condition in which the body produces too much of the hormone cortisol. This condition can be caused by a tumor or certain medications.
- Congenital adrenal hyperplasia: This is a condition that is present at birth. This problem occurs because the body lacks an enzyme needed to make hormones.
- Primary aldosteronism: In this condition, too much of the hormone aldosterone is produced.
How do I know if I have a problem with my adrenal glands?
The symptoms of adrenal gland problems vary depending on which hormone is out of balance. Many of the symptoms are similar to those of other common illnesses, so they can be difficult to diagnose.
You can get an idea about this from the table below.
| Affected system | Possible symptoms |
|---|---|
| Metabolism | Unexplained weight gain or loss, constant fatigue, constant increases or decreases in blood sugar, and weakness. |
| Immune system | Frequent illness and infections. |
| Blood pressure | High blood pressure or low blood pressure. |
| Sexual characteristics | Women experience facial hair growth, hair loss, acne, and deepening of the voice. |
When should you see a doctor?
If you have one or more of the symptoms mentioned above, especially unexplained weight changes, excessive fatigue, or unusual changes in blood pressure , please don't just ignore it and think, 'These are normal things.'
What you should do is see your family doctor (GP) and talk about this clearly.
Your doctor will check your hormone levels with several blood and urine tests, if necessary. If there are any abnormalities in those tests, he may also refer you for tests such as a CT scan or MRI scan. If necessary, he will refer you to an endocrinologist, a doctor who specializes in the endocrine system and hormones.
Take-Home Message
- The adrenal glands are two small, yet vital, hormone-producing glands located above our kidneys.
- Many important things, such as coping with stress, controlling blood pressure, and managing energy, are controlled by the hormones produced by these glands.
- Problems arise if these hormones are produced too much or not enough.
- If you have symptoms like unexplained weight changes, excessive fatigue, changes in blood pressure, or skin changes, don't ignore them.
- If you have any doubts or symptoms, be sure to consult your doctor for advice. Early detection of the disease is much easier for treatment.
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