The thyroid hormone is the hormone that’s mainly responsible for controlling the speed of your body’s metabolism. In infants, thyroid hormone is critical for brain development. Your thyroid, a small, butterfly-shaped gland located at the front of your neck under your skin, makes and releases thyroid hormone. It’s a part of your endocrine system.
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Thyroid hormone actually represents the combination of the two main hormones that your thyroid gland releases: thyroxine (T4) and triiodothyronine (T3). They’re often collectively referred to as “thyroid hormone” because T4 is largely inactive, meaning it doesn’t impact your cells, whereas T3 is active. Once your thyroid releases T4, certain organs in your body transform it into T3 so that it can impact your cells and your metabolism.
How are thyroid hormone levels controlled?
The production and release of thyroid hormone — thyroxine (t4) and triiodothyronine (T3) — is controlled by a feedback loop system that involves the following:
Hypothalamus.
Pituitary gland.
Thyroid gland.
Multiple hormones.
Your pituitary gland is connected to your hypothalamus through a stalk of blood vessels and nerves. This is called the pituitary stalk. Through the stalk, your hypothalamus communicates with your pituitary gland and tells it to release certain hormones.
What is the function of the thyroid hormone?
Once your thyroid releases thyroxine (T4) into your bloodstream, certain cells in your body transform it into triiodothyronine (T3) through a process called de-iodination. This is because cells that have receptors that receive the effect of thyroid hormone are better able to use T3 than T4. Therefore, T4 is generally considered to be the inactive form of thyroid hormone, and T3 is considered the active form of it.
Cells in the following tissues, glands, organs and body systems can convert T4 to T3:
Liver.
Kidneys.
Muscles.
Thyroid.
Pituitary gland.
Brown adipose (fat) tissue (This type of fat produces heat to help maintain your body temperature in cold conditions).
Central nervous system.
Thyroid hormone (T3 and T4) affects every cell and all the organs in your body by:
Regulating the rate at which your body uses calories (energy). This affects weight loss or weight gain and is called the metabolic rate.
Slowing down or speeding up your heart rate.
Raising or lowering your body temperature.
Influencing the speed at which food moves through your digestive tract.
Affecting brain development.
Controlling the way your muscles contract.
Managing skin and bone maintenance by controlling the rate at which your body replaces dying cells (a normal process).
What tests measure thyroid levels?
Several blood tests can measure your thyroid levels and assess how well your thyroid is working. These tests are often called thyroid function tests and include:
Total T4 (thyroxine) test.
Free T4 (FT4) test.
Total T3 (triiodothyronine) test.
Free T3 (Ft3) test.
Thyroid-stimulating hormone (TSH) test.
Your provider may order additional tests to assess your thyroid function, including:
Thyroid antibodies: These tests help identify different types of autoimmune thyroid conditions.
Thyroglobulin: This test is used to diagnose thyroiditis (thyroid inflammation) and to monitor the treatment of thyroid cancer.
What conditions are related to abnormal thyroid hormone levels?
Several conditions can result from or cause abnormal thyroid hormone levels. Thyroid disease is very common, with an estimated 20 million people in the United States having some type of thyroid condition. A person assigned female at birth is about five to eight times more likely to have a thyroid condition than a person assigned male at birth.
Thyroid conditions include:
Hypothyroidism (underactive thyroid).
Hashimoto’s disease (an autoimmune condition that causes hypothyroidism).
Hyperthyroidism (overactive thyroid).
Graves’ disease (an autoimmune condition that causes hyperthyroidism).
Thyroiditis (thyroid inflammation).
Thyroid nodules.
Goiter (enlarged thyroid gland).
Thyroid cancer.
Issues with your pituitary gland or hypothalamus can also cause abnormal thyroid hormone levels since they help control thyroid hormone levels.
When should I see my doctor about my thyroid hormone levels?
Abnormal thyroid hormone levels usually cause noticeable symptoms. Since thyroid hormone is responsible for controlling the speed of your metabolism, too much thyroid hormone can make it faster than normal and too little thyroid hormone can slow it down. These imbalances cause certain symptoms, including:
Once your thyroid releases thyroxine (T4) into your bloodstream, certain cells in your body transform it into triiodothyronine (T3) through a process called de-iodination. This is because cells that have receptors that receive the effect of thyroid hormone are better able to use T3 than T4. Therefore, T4 is generally considered to be the inactive form of thyroid hormone, and T3 is considered the active form of it.
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Answer:
Explanation:
What is thyroid hormone?
The thyroid hormone is the hormone that’s mainly responsible for controlling the speed of your body’s metabolism. In infants, thyroid hormone is critical for brain development. Your thyroid, a small, butterfly-shaped gland located at the front of your neck under your skin, makes and releases thyroid hormone. It’s a part of your endocrine system.
ash8425
Thyroid hormone actually represents the combination of the two main hormones that your thyroid gland releases: thyroxine (T4) and triiodothyronine (T3). They’re often collectively referred to as “thyroid hormone” because T4 is largely inactive, meaning it doesn’t impact your cells, whereas T3 is active. Once your thyroid releases T4, certain organs in your body transform it into T3 so that it can impact your cells and your metabolism.
How are thyroid hormone levels controlled?
The production and release of thyroid hormone — thyroxine (t4) and triiodothyronine (T3) — is controlled by a feedback loop system that involves the following:
Hypothalamus.
Pituitary gland.
Thyroid gland.
Multiple hormones.
Your pituitary gland is connected to your hypothalamus through a stalk of blood vessels and nerves. This is called the pituitary stalk. Through the stalk, your hypothalamus communicates with your pituitary gland and tells it to release certain hormones.
What is the function of the thyroid hormone?
Once your thyroid releases thyroxine (T4) into your bloodstream, certain cells in your body transform it into triiodothyronine (T3) through a process called de-iodination. This is because cells that have receptors that receive the effect of thyroid hormone are better able to use T3 than T4. Therefore, T4 is generally considered to be the inactive form of thyroid hormone, and T3 is considered the active form of it.
Cells in the following tissues, glands, organs and body systems can convert T4 to T3:
Liver.
Kidneys.
Muscles.
Thyroid.
Pituitary gland.
Brown adipose (fat) tissue (This type of fat produces heat to help maintain your body temperature in cold conditions).
Central nervous system.
Thyroid hormone (T3 and T4) affects every cell and all the organs in your body by:
Regulating the rate at which your body uses calories (energy). This affects weight loss or weight gain and is called the metabolic rate.
Slowing down or speeding up your heart rate.
Raising or lowering your body temperature.
Influencing the speed at which food moves through your digestive tract.
Affecting brain development.
Controlling the way your muscles contract.
Managing skin and bone maintenance by controlling the rate at which your body replaces dying cells (a normal process).
What tests measure thyroid levels?
Several blood tests can measure your thyroid levels and assess how well your thyroid is working. These tests are often called thyroid function tests and include:
Total T4 (thyroxine) test.
Free T4 (FT4) test.
Total T3 (triiodothyronine) test.
Free T3 (Ft3) test.
Thyroid-stimulating hormone (TSH) test.
Your provider may order additional tests to assess your thyroid function, including:
Thyroid antibodies: These tests help identify different types of autoimmune thyroid conditions.
Thyroglobulin: This test is used to diagnose thyroiditis (thyroid inflammation) and to monitor the treatment of thyroid cancer.
What conditions are related to abnormal thyroid hormone levels?
Several conditions can result from or cause abnormal thyroid hormone levels. Thyroid disease is very common, with an estimated 20 million people in the United States having some type of thyroid condition. A person assigned female at birth is about five to eight times more likely to have a thyroid condition than a person assigned male at birth.
Thyroid conditions include:
Issues with your pituitary gland or hypothalamus can also cause abnormal thyroid hormone levels since they help control thyroid hormone levels.
When should I see my doctor about my thyroid hormone levels?
Abnormal thyroid hormone levels usually cause noticeable symptoms. Since thyroid hormone is responsible for controlling the speed of your metabolism, too much thyroid hormone can make it faster than normal and too little thyroid hormone can slow it down. These imbalances cause certain symptoms, including:
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Answer:
Once your thyroid releases thyroxine (T4) into your bloodstream, certain cells in your body transform it into triiodothyronine (T3) through a process called de-iodination. This is because cells that have receptors that receive the effect of thyroid hormone are better able to use T3 than T4. Therefore, T4 is generally considered to be the inactive form of thyroid hormone, and T3 is considered the active form of it.
Explanation:
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