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What Is The Job Of The Thyroid

When It Doesnt Work Right

What is Thyroid Disease? (HealthSketch)

Sometimes, the thyroid gland develops a problem. It might start producing too much or too little hormone. It might become enlarged, or it could grow lumps of extra tissue.

More than 12% of people will have some sort of problem with their thyroid during their lifetime. Women are far more likely to have this happen than men.

Common thyroid problems include:

Hypothyroidism. This occurs when your thyroid doesnât make enough hormones. That slows your metabolism. It can make you gain weight and feel sluggish or depressed. Sometimes thatâs caused by a condition called Hashimotoâs disease. This happens when your bodyâs disease-fighting immune system attacks the thyroid.

Hyperthyroidism. If youâre feeling irritable, losing weight, your heart races, and youâre feeling weak, your thyroid might be producing too much hormone. This is often the result of another immune system problem, known as Gravesâ disease, but can be caused by other conditions as well.

Goiters. A goiter happens when your thyroid gland swells up. Sometimes, it makes a noticeable bulge in your neck other times, it can make you cough or make your voice sound hoarse. A goiter can be caused by other thyroid conditions or by a lack of iodine, an element your thyroid needs to work properly. Most Americans get plenty of iodine because itâs now added to table salt in the United States.

Questions To Ask Your Endocrinologist:

  • What tests do I need to check my thyroid levels?
  • What are the normal ranges for each hormone?
  • Are my T3, T4, and TSH levels normal?
  • Are my symptoms indicative of a thyroid disorder?
  • How can we correct any issues with the levels through medication or lifestyle changes?
  • Are there any side effects to the medications?
  • How long does it take before the medicine starts to work?

The Role Of The Thyroid Gland

The thyroid is a gland in the neck, just below the voicebox. It is an endocrine gland. Endocrine glands make hormones. These are chemicals that carry messages through the bloodstream to other parts of the body. The thyroid gland makes thyroid hormones. The thyroid gland is managed by the pituitary gland, which sits at the base of the brain.

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How Is The Sample Collected For Testing

A blood sample is taken by a needle placed in a vein in your arm. A tourniquet is wrapped around your upper arm. It may feel tight. You may feel nothing at all from the needle, or you may feel a quick sting or pinch. The blood sample is collected in a tube, which is sent to the laboratory for analysis.

How Can I Promote The Health Of The Thyroid Gland


Iodine is most essential to maintain a healthy thyroid. Iodine is the critical ingredient for the production of thyroid hormones. We dont need a lot of iodine, it is said that one teaspoon of iodine is enough for a lifetime. Nonetheless, the daily and constant supply of this micronutrient is important. Too much iodine at once is counter-productive and causes your thyroid to produce less hormones. The best way to get your daily dose of iodine is through eating healthy foods like seafood and dairy products. In addition, iodized salt is a good source and you can use it to season your food. Nowadays, iodine is added to salt to combat goitres .

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What Is The Role Of The Thyroid


Also question is, what does the thyroid do?

The thyroid gland produces hormones that regulate the body’s metabolic rate as well as heart and digestive function, muscle control, brain development, mood and bone maintenance. Its correct functioning depends on having a good supply of iodine from the diet.

Subsequently, question is, what all does the thyroid affect? Thyroid gland hormones can affect food metabolism, mood, and sexual function. When the thyroid produces too much hormone, the body uses energy faster than it should.

Likewise, why is the thyroid gland so important?

The thyroid gland is a vital hormone gland: It plays a major role in the metabolism, growth and development of the human body. It helps to regulate many body functions by constantly releasing a steady amount of thyroid hormones into the bloodstream.

What controls the thyroid gland?

The pituitary gland and hypothalamus both control the thyroid. When thyroid hormone levels drop too low, the hypothalamus secretes TSH Releasing Hormone , which alerts the pituitary to produce thyroid stimulating hormone . The thyroid responds to this chain of events by producing more hormones.

What Common Symptoms Can Happen With Thyroid Disease

There are a variety of symptoms you could experience if you have a thyroid disease. Unfortunately, symptoms of a thyroid condition are often very similar to the signs of other medical conditions and stages of life. This can make it difficult to know if your symptoms are related to a thyroid issue or something else entirely.

For the most part, the symptoms of thyroid disease can be divided into two groups those related to having too much thyroid hormone and those related to having too little thyroid hormone .

Symptoms of an overactive thyroid can include:

  • Experiencing anxiety, irritability and nervousness.
  • Having trouble sleeping.
  • Experiencing an intolerance to cold temperatures.

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Control Of The Thyroid By Iodine

Iodide is known to control thyroid function. Its main effects are to decrease the response of the thyroid to thyrotropin to acutely inhibit its own oxidation to reduce its trapping after a delay and, at high concentrations, to inhibit thyroid hormone secretion. Small changes in iodine intake are sufficient to reset the thyroid system at different serum TSH levels. This suggests that modulation of the thyroid response to TSH by iodide plays a major role in the negative feedback loop. In response to increasing doses of iodide, iodine organification increases initially and then decreases. This acute inhibition of organification, termed ‘the Wolff-Chaikoff effect’, results from a high concentration of inorganic iodide within thyroid cells,,. The mechanism responsible for inhibition of organification is unclear, but it may be caused by inhibitory effect of iodide on thyroid peroxidase or some other enzymes. In normal subjects who have been given iodide, the inhibition of organification is transient and this phenomenon is termed ‘escape from the Wolff-Chaikoff effect’ or ‘adaptation to the Wolff-Chaikoff effect’.

What Is Thyroid Disease

The Thyroid Factory: Understanding Thyroid Function and Thyroid Function Tests

Thyroid disease is a general term for a medical condition that keeps your thyroid from making the right amount of hormones. Your thyroid typically makes hormones that keep your body functioning normally. When the thyroid makes too much thyroid hormone, your body uses energy too quickly. This is called hyperthyroidism. Using energy too quickly will do more than make you tired it can make your heart beat faster, cause you to lose weight without trying and even make you feel nervous. On the flip-side of this, your thyroid can make too little thyroid hormone. This is called hypothyroidism. When you have too little thyroid hormone in your body, it can make you feel tired, you might gain weight and you may even be unable to tolerate cold temperatures.

These two main disorders can be caused by a variety of conditions. They can also be passed down through families .

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What To Do If Your Thyroid Is Acting Up

So what should you do next after reading this article? Especially if you suspect you have some sort of thyroid problem?

Your best bet is to follow these 6 steps listed below:

These steps are designed to help get you started on the right track so you can get back to feeling healthy and back to normal.

Always remember that each person is unique and may present slightly differently so it’s difficult to fit everyone into a simple “treatment box” but using this approach should help.

Now I want to hear from you:

Do you suspect you have issues with your thyroid?

Are you experiencing symptoms associated with any of the 10 functions we discussed above?

Have you been tested for thyroid problems?

What, if anything, did your lab tests show?

Leave your comments below!

What Medical Conditions Are Related To The Thyroid Gland

Almost 1 in 6 Australians has a thyroid problem. The chance of having trouble with your thyroid becomes greater as you get older.

Sometimes people have problems with their thyroid being overactive and producing too much thyroxine . It can be caused by an autoimmune disorder causing inflammation of the thyroid gland, Graves disease, or nodules on the thyroid. Hyperthyroidism makes the body use energy too quickly. Symptoms of hyperthyroidism include:

  • weight loss

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Thyroid Hormones Nutrient Synthesis And Metabolism

Nutrients and how efficiently they are metabolized have been shown to influence and be influenced by the thyroid axis. In mammals, hyperthyroidism is associated with high metabolismincreased fat breakdown, weight loss, increased liver cholesterol synthesis and clearance, and low serum cholesterolwhile the opposite occurs in hypothyroidism . For example, in rats, T3 increases caloric intake and leads to increased lipolysis , while hypothyroid female rats have reduced hepatic mRNA expressions associated with cholesterol uptake and lipid oxidation . Conversely, the quality of nutrients influences the thyroid axis and TH production. Rats fed fish oil diets have higher liver TR expression and increased thyroid signaling associated with lipid metabolism than rats fed soybean oil diets , and rats fed diets supplemented with Yucca schidigera , have lower THs levels than control animals .

What Does The Thyroid Gland Do

Thyroid Gland

The thyroid gland produces hormones that regulate the body’s metabolic rate controlling heart, muscle and digestive function, brain development and bone maintenance. Its correct functioning depends on a good supply of iodine from the diet. Cells producing thyroid hormones are very specialised in extracting and absorbing iodine from the blood and incorporate it into the thyroid hormones.

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Where Is My Thyroid Gland

The thyroid gland is located at the front of the neck just below the Adam’s apple . It is butterfly-shaped and consists of two lobes located either side of the windpipe . A normal thyroid gland is not usually outwardly visible or able to be felt if finger pressure is applied to the neck.

Diagram showing the location of the thyroid gland in the neck. It has two lobes and sits in front of the windpipe . The voice box sits just above the thyroid.

Feeding And Nutrient Homeostasis

The nutritional energy provided by food intake is essential for activity, growth, and maintenance of bodily functions. In fish as in mammals , food intake is mainly regulated by brain feeding centers controlled by central and peripheral endocrine signals, which either stimulate or inhibit feeding behavior. Feeding centers receive information about nutritional status from the periphery either via the general circulation or the brainstem/vagal complex. These peripheral signals include ghrelin, cholecystokinin , peptide YY , and leptin. Usually, when food intake is restricted, the expression of orexigenic hormones increases while that of anorexigenic hormones decreases .

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Thyroid Hormones T3 And T4

These hormones keep your body functioning at the right speed.

If your thyroid gland does not make enough hormones, your bodys cells work slower than normal. You usually feel tired and put on weight more easily. This is called hypothyroidism, or an underactive thyroid.

If your thyroid gland makes too many hormones, your bodys cells work faster than normal. This is called hyperthyroidism, or an overactive thyroid. You usually lose weight, feel hungrier than normal, and feel shaky and anxious. Your heartbeat may be faster than normal or irregular.

A part of your brain called the hypothalamus senses if the levels of T3 and T4 in your blood are too low. If they are, it sends thyroid-releasing hormones into your blood. The rising level of TRH makes another gland in the brain release thyroid-stimulating hormone . TSH then stimulates the thyroid gland to produce more T3 and T4. If your brain senses that the levels of T3 and T4 are too high, it sends messages to lower the amount of TSH.

Most people with thyroid cancer have normal levels of T3 and T4.

The thyroid gland needs a regular supply of iodine to produce thyroid hormones. We get iodine from our diet. It is mainly found in fish, seafood and dairy products. Some types of salt also contain iodine, but they are not commonly used in the UK.

See also

Types Of Thyroid Problems

The Role of Thyroid

Hopefully, you’re beginning to get the idea that there are MANY things that can go wrong with your thyroid gland.

The good news is that some of the problems associated with your thyroid have no effect on thyroid hormone production.

What does that mean?

It means that even if you have a condition such as thyroid cancer or a thyroid nodule, there’s a low chance that it will interfere with thyroid function in your body.

That means you probably won’t have the symptoms we discussed above.

But, on the other hand, there are some conditions which primarily do alter your ability to produce thyroid hormone.

These conditions, such as Hashimoto’s thyroiditis, WILL cause symptoms.

To give you a better idea of what can go wrong with your thyroid I’ve included some of the most common problems below:

Figuring out what is wrong with your thyroid is of utmost priority.

When you go to your Doctors office make sure you walk out with a diagnosis or at least an idea as to what is going on.

If you don’t then you may end up frustrated without any real clear idea how to treat your issue.

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When To Contact A Doctor

If an individual has a family history of thyroid disease, they should have regular blood work to monitor their thyroid hormone levels and ensure they remain within an acceptable range.

Anyone experiencing symptoms of hyperthyroidism or hypothyroidism should visit a doctor to review their hormone levels. People should also contact their doctor if they can feel a new lump in their neck or experience any symptoms affecting their throats, such as difficulty eating or breathing.

Doctors can diagnose thyroid diseases through:

  • physical examination
  • thyroid tests
  • biopsy

How Does The Thyroid Gland Work

The thyroid gland is a vital hormone gland: It plays a major role in the metabolism, growth and development of the human body. It helps to regulate many body functions by constantly releasing a steady amount of thyroid hormones into the bloodstream. If the body needs more energy in certain situations for instance, if it is growing or cold, or during pregnancy the thyroid gland produces more hormones.

This organ is found at the front of the neck, under the voice box. It is butterfly-shaped: The two side lobes lie against and around the windpipe , and are connected at the front by a narrow strip of tissue.

The thyroid weighs between 20 and 60 grams on average. It is surrounded by two fibrous capsules. The outer capsule is connected to the voice box muscles and many important vessels and nerves. There is loose connective tissue between the inner and the outer capsule, so the thyroid can move and change its position when we swallow.

The thyroid tissue itself consists of a lot of small individual lobules that are enclosed in thin layers of connective tissue. These lobules contain a great number of small vesicles called follicles which store thyroid hormones in the form of little droplets.

Thyroid gland cells

The thyroid gland produces three hormones:

  • Triiodothyronine, also known as T3
  • Tetraiodothyronine, also called thyroxine or T4
  • Calcitonin

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Blood Lymph And Nerve Supply

The thyroid is supplied with arterial blood from the superior thyroid artery, a branch of the external carotid artery, and the inferior thyroid artery, a branch of the thyrocervical trunk, and sometimes by an anatomical variant the thyroid ima artery, which has a variable origin. The superior thyroid artery splits into anterior and posterior branches supplying the thyroid, and the inferior thyroid artery splits into superior and inferior branches. The superior and inferior thyroid arteries join together behind the outer part of the thyroid lobes. The venous blood is drained via superior and middle thyroid veins, which drain to the internal jugular vein, and via the inferior thyroid veins. The inferior thyroid veins originate in a network of veins and drain into the left and right brachiocephalic veins. Both arteries and veins form a plexus between the two layers of the capsule of the thyroid gland.

What Happens In Your Body

Thyroid Strong â Dr. Jockers Store

Thyroid hormones have an impact on every cell and every organ. Specifically, T3 directly controls the production of various proteins made by your bodys cells. T3 does this by binding to a cells DNA.

Free T4 and free T3 circulating in your blood are available to immediately enter your bodys cells whenever they’re needed, for instance, when you’re cold or when your body is digesting food. Some of the intracellular T4 is converted to T3, and some of the T3 binds to specific T3-receptors in the nucleus of the cell. This bound T3 causes nuclear DNA to stimulate the production of specific proteins.

Among these proteins are various enzymes that, in turn, control the behavior of many important bodily functions mentioned above, such as how quickly your food is digested, your heart rate, body temperature, and how fast calories are burned.

Though thyroid hormones regulate DNA in this way in all cases, different cells in your body have different kinds of T3-nuclear receptors and in different concentrations. As such, the effect of T3 on a cell is quite variable from tissue to tissue and under various circumstances.

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