What is the target organ of T4?

Article by: Arnau Holguín Jr. | Last update: April 10, 2022
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The thyroid hormones, thyroxine (T4) and triiodothyronine are formed and secreted by the thyroid glands.

What is the target organ of T3 and T4?

– The thyroid gland, located in the anterior portion of the neck, secretes the hormones thyroxine (T4), triiodothyronine (T3), and calcitonin.

What is the difference between the thyroid and the parathyroid?

The thyroid gland uses iodine from food to make two thyroid hormones that control how the body uses energy. The parathyroid glands are four tiny glands that are located behind the thyroid.

What is the target organ of the thyroid?

The hypothalamus and pituitary gland, which are located in the brain, help control the thyroid gland. The hypothalamus releases thyrotropin-releasing hormone (TRH), which stimulates the pituitary gland to release thyrotropin (TSH).

What is the target organ of the hormone calcitonin?

This hormone is produced in the parafollicular cells (also called C cells) of the thyroid gland and its function is to reduce blood calcium levels (Ca2+), opposing the action of parathyroid hormone (parathormone).

43 related questions found

What is the function of the hormone T3 and T4?

T3 and T4 work in concert to regulate the body’s use of energy. They also play an important role in controlling weight, body temperature, muscle strength, and the functioning of the nervous system.

What is the function of the thyroid and parathyroid?

The main function of the parathyroid glands is to secrete a hormone (parathyroid or PTH) responsible for regulating phosphorus-calcium metabolism.

What disease causes the parathyroid?

There are three types of parathyroid disease: hyperparathyroidism, parathyroid cancer, and hypoparathyroidism.


    osteoporosis.kidney stones.heart disease.high blood pressure.

What causes the lack of parathyroids?

The parathyroid glands produce parathyroid hormone (PTH), which helps the body maintain a balance between calcium and phosphorous. If the parathyroid glands produce too much or too little of the hormone, they upset the balance.

What is the target organ?

These organs, called target organs, produce responses in accordance with the concentration of hormone detected in the blood. The existence of a hormone can lead to the appearance of structures that would not appear without its presence. Examples are the rooster comb or the sexual tissue of female chimpanzees.

What are white organs and what are they?

The targets of a hormone are those structures that have a specific receptor for it. The endocrine glands are: the pituitary gland, the thyroid gland, the parathyroid glands, the adrenal glands, a portion of the pancreas, and the sex glands (ovaries and testicles).

What is the target organ of the pituitary?

The hormone Oxytocin exerts a control mechanism on two target organs, these are: Uterus, Mammary gland. At the uterine level, apparently, it generates a stimulating effect producing contractions for childbirth.

What happens if you have high thyrotropin?

Thyrotropin is high when the thyroid does not produce enough thyroid hormones (T4 or Thyroxine and T3 or Triiodothyronine), in such a way that the pituitary increases the production of Thyrotropin or TSH. When the level of elevation occurs above normal values, it is said that there is hypothyroidism.

How does a hormone act on a certain target organ?

The blood transports the hormones to target cells that contain receptor proteins specific for the hormones and that, consequently, can respond in a specific way to them. Many endocrine glands are organs whose primary functions are the production and secretion of hormones (Figure 11–1a).

What affects the malfunction of the parathyroid gland?

Its symptoms may include numbness around the mouth, hands, or feet, spasms, seizures, low blood pressure, lack of emotional stability, anxiety or depression, dental problems, and rough or brittle hair.

What are the symptoms of parathyroid?

Parathyroid Cancer: Symptoms and Signs

    Bone pain. Kidney problems, including upper back pain and excessive urination. Stomach pain. History of gastroduodenal ulcers, which are ulcers found in the stomach or small intestine. Weakness. Difficulty speaking. Vomiting.

What is the function of T3?

Triiodothyronine (T3) is a thyroid hormone. It plays an important role in the body’s control of metabolism (the many processes that control the rate of activity in cells and tissues). A laboratory test can be done to measure the amount of T3 in the blood.

What is the function of the hormone calcitonin?

Calcitonin is a hormone produced by the thyroid, a small, butterfly-shaped gland near the throat. Calcitonin helps control how the body uses calcium. Calcitonin is a type of tumor marker.

How is the hormone T3 and T4 produced?

The thyroid gland produces and secretes two thyroid hormones: thyroxine (T4) and triiodothyronine (T3). The thyroid gland and the pituitary gland (pituitary gland) work together. The pituitary gland (located near the base of the brain) makes, stores, and secretes thyrotropin (TSH).

What is the target organ of cortisol?

Cortisol is secreted and stored in the zona fascicularis of the adrenal cortex, one of two parts of the adrenal gland. This release is controlled by the hypothalamus, a part of the brain, in response to stress or a low level of glucocorticoids in the blood.

What cells produce calcitonin?

Parafollicular cells secrete the hormone calcitonin. The thyroid needs iodine to make hormones. The thyroid plays an important role in regulating metabolism and the body’s calcium balance.

Where is calcitonin stored?

Calcitonin is a peptide hormone that originates from the parafollicular C cells of the thyroid; it is also found in parathyroids, thymus, semen and in the central nervous system.

What are white cells?

White cell is a term applied to any cell in which a hormone binds to its receptor, whether or not a biochemical or physiological response has been determined.

What are the 5 white organs?

According to him, there are only five organs that perform essential vital functions for the preservation of life: the brain, the heart, the liver, at least one lung and at least one kidney.

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