0
How the level of thyroxine in the blood affects the secretion of hormone TSH?
Wiki User
∙ 12y ago
by excircsing
Wiki User
∙ 12y ago
High levels of thyroxine in the blood negatively feedback to the pituitary gland, reducing the secretion of thyroid-stimulating hormone (TSH). Conversely, low levels of thyroxine signal the pituitary gland to increase TSH secretion to stimulate the thyroid gland to produce more thyroxine.
Add your answer:
Earn +20 pts
How does a negative feedback system work and Explain how negative feedback regulates the amount of thyroxine in the blood?
A negative feedback system works by detecting changes in a physiological variable and activating mechanisms to counteract those changes, maintaining homeostasis. In the case of regulating thyroxine levels in the blood, if the concentration of thyroxine becomes too high, the hypothalamus reduces the release of thyrotropin-releasing hormone (TRH), which in turn decreases the secretion of thyroid-stimulating hormone (TSH) from the pituitary gland. This leads to a decrease in thyroid hormone production by the thyroid gland, helping to restore normal thyroxine levels in the blood.
What controls thyroxine?
Thyroxine is primarily controlled by the hypothalamus-pituitary-thyroid (HPT) axis. Thyrotropin-releasing hormone (TRH) from the hypothalamus stimulates the release of thyroid-stimulating hormone (TSH) from the pituitary gland, which then stimulates the thyroid gland to produce thyroxine (T4) and triiodothyronine (T3). Feedback mechanisms help regulate the levels of thyroxine in the body.
What is the name of the hormone that promotes sodium retention and potassium secretion?
Aldosterone is the hormone responsible for promoting sodium retention and potassium secretion in the kidneys. It helps regulate blood pressure and electrolyte balance in the body.
Which hormone most affect the osmolarity of blood?
Antidiuretic hormone (ADH) is the hormone that most affects the osmolarity of blood. ADH acts on the kidneys to regulate water reabsorption, helping to maintain the balance of water and electrolytes in the blood and thus control its osmolarity.
What is an antagonistic hormone to actions of aldosterone?
The hormone that antagonizes the actions of aldosterone is atrial natriuretic peptide (ANP). ANP inhibits aldosterone secretion and activity, promoting salt and water loss by the kidneys, which helps to reduce blood pressure and blood volume.
How does a negative feedback system work and Explain how negative feedback regulates the amount of thyroxine in the blood?
A negative feedback system works by detecting changes in a physiological variable and activating mechanisms to counteract those changes, maintaining homeostasis. In the case of regulating thyroxine levels in the blood, if the concentration of thyroxine becomes too high, the hypothalamus reduces the release of thyrotropin-releasing hormone (TRH), which in turn decreases the secretion of thyroid-stimulating hormone (TSH) from the pituitary gland. This leads to a decrease in thyroid hormone production by the thyroid gland, helping to restore normal thyroxine levels in the blood.
The secretion of parathyroid hormone is controlled primarily by the?
concentration of blood calcium.
What hormone affects blood circulation?
hgh
What is the body's major metabolic hormone?
The Thyroid gland produces thyroxine, which regulates metabolism throughout the body.
Why is it important to test a baby's blood for the thyroxine level?
Thyroxine is the precursor to active thyroid hormone, which is essential for life. Thyroid hormone also plays an important role in brain development. A child with untreated low thyroid hormone (hypothyroidism) will develop a condition known as cretinism, which is marked by severe physical and mental abnormalities.
Changes in blood osmotic pressure would most affect the secretion of?
Changes in blood osmotic pressure would most affect the secretion of antidiuretic hormone (ADH) by the pituitary gland. ADH helps regulate the concentration of urine by increasing water reabsorption in the kidneys, and its secretion is influenced by blood osmotic pressure to maintain water balance in the body.
What type of reflex does the secretion of the hormone insulin in response to changes in blood glucose levels?
Endocrine reflex
What controls thyroxine?
Thyroxine is primarily controlled by the hypothalamus-pituitary-thyroid (HPT) axis. Thyrotropin-releasing hormone (TRH) from the hypothalamus stimulates the release of thyroid-stimulating hormone (TSH) from the pituitary gland, which then stimulates the thyroid gland to produce thyroxine (T4) and triiodothyronine (T3). Feedback mechanisms help regulate the levels of thyroxine in the body.
How is anti diuretic hormone secretion regulated?
Antidiuretic hormone (ADH) is regulated by the pituitary gland. The anitidiuretic hormone maintains blood pressure and controls incoming water through the kidneys
How does a negative feedback system work explain how negative feedback regulates the amount of thyroxine in the blood?
When the amount of a particular hormone in the blood is reaches a certain level, the endocrine system sends signals to stop the release of that hormone. "Pearson Education Inc."
What type of stimulation controls parathyroid release?
Parathyroid release is primarily controlled by the level of calcium in the blood. When calcium levels are low, the parathyroid gland releases parathyroid hormone (PTH) to increase calcium levels in the blood. Additionally, low magnesium levels and high phosphate levels can also stimulate the release of PTH.
What are characteristic of hormones?
Hormones are the chemicals which are produced by glands. By definition they pour there secretion/secretions in blood. Blood carry the secretion through circulation to target organ/ organs for desired effect. Usually target organ sends back the message to reduce the secretion of the hormone producing gland. This is called as negative feed back effect. (Like thyroid stimulating orAdrenocorticotrophic hormone by anterior pituitary gland.) Sometimes hormone like Follicle stimulating hormone stimulates ovarian follicle. Which in turn produces hormone estrogen. Main female hormone. Thyroid hormones increase the 'basal metabolic rate' of body.
