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Will high levels of testosterone inhibit the A hypothalamus B anterior pituitary gland?
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∙ 12y ago
A. Hypothalamus
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∙ 12y ago
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Regulation of the release of T3 and T4 from the thyroid gland is controlled by negative feedback?
When the level of the thyroxine increase, the level of the thyroid stimulating hormone decrease. So in turn the level of the thyroid hormone decreases. When the level of the thyroxine decrease, the level of the thyroid stimulating hormone increase. This in turn increase the level of the thyroxine. This explanation does not explain to how the level of the hormone is regulated at that particular level. But then this explanation satisfy most of the people.
Is low testosterone level linked with decreased penis size?
If during puberty, a male has low testosterone, it COULD inhibit development of the penis, and other reproductive organs. However, low testosterone is a rare condition. However, just because someone has a below average sized penis, it does not indicate that they have low testosterone. Penis size is determined mostly by genetics.
What antibiotics inhibit DNA synthesis?
penicillin
What antibiotics inhibit RNA synthesis?
a big banana
Why use isopropyl alcohol to inhibit bacterial growth?
Isopropyl alcohol is used to inhibit bacterial growth because it acts as a disinfectant. This kills the bacteria and prevent them from multiplying.
How does the anterior pituitary regulate the thyroid gland?
The hypothalmus is connected to the pituitary by the hypophyseal portal system. This is a network of capillary beds that allows the hypothalmus to control the release of hormones from the anterior and posterior pituitaryThe two pituitary lobes are the dual origin of the hypothalmus. The posterior pituitary lobe is part of the brain and is a "downgrowth" of hypothalmic tissue and maintains a neural connection with the hypothalmus through a nerve bundle called the hypothalamic-hypophyseal tract. This arises from neurons of the hypothalmus. These cells synthesize two neurohormones and transport them along their axons to the posterior pituitary. Then these neurons "fire" they release the stored hormones into a capillary bed in the posterioir pituitary for distribution throughout the body.The hypothalamus is connected to the pituitary gland by both blood vessels and neural tissue. The posterior pituitary is actually part of the brain and receives input from the hypothalamus via neural connections. The anterior pituitary gland is controlled by the hypothalamus when the latter releases tropic hormones (hormones that control release of other hormones) into the blood portal. The hormones diffuse through the blood and act on the anterior pituitary gland, initiated the release of subsequent hormones.The hypothalamus controls both the anterior and posterior pituitary functioning with neurosecretions that either release or inhibit hormones. These secretions are produced in the ventral hypothalamus
Why is the anterior pituitary called the master gland?
An endocrine gland is any organ that secretes chemicals (called hormones) into the blood. The hypothalamus releases several hormones, including corticotropin-releasing hormone, thyrotropin-releasing hormone, growth hormone-releasing hormone, oxytocin, antidiuretic hormone, and a bunch of others. Because many of these hormones regulate the activity of the pituitary gland, which is often called the master regulator of the endocrine system, the hypothalamus is often considered the ultimate regulator of the endocrine system.
How is the production of hormones such as thyroxine and estrogen regulated?
If you have an inactive thyroid, than usually they will regulate it with a medication called synthroid. People who have there thyroid removed also have it regulated with a medication called synthroid.
What are functions of the hypothalamus gland?
One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis). The hypothalamus is responsible for certain metabolic processes and other activities of the Autonomic Nervous System. It synthesizes and secretes neurohormones, often called hypothalamic-releasing hormones, and these in turn stimulate or inhibit the secretion of pituitary hormones. The hypothalamus controls body temperature, hunger, thirst, fatigue, and circadian cycles.
Where are LH and FSH produced?
Gonadotropic hormones FSH (Follicle stimulating hormone) and LH (Luteinizing hormone) are produced and secreted by the gonadotrophs in anterior pituitary. These are the trophic hormones that act on the ovaries and testes. Required for ovulation, spermatogenesis, biosynthesis of estrogens and androgens. They are also used therapeutically to promote fertility. Their secretion is regulated by the hypothalamus GRH (gonadotropin releasing hormone), where GRH stimulates the release of FSH and LH and FSH and LH feedback and decreases levels of GRH release. Estrogens and androgens also feedback and inhibit the gonadotrophs in the pituitary and feedback on the hypothalamus.
What does dopamine do for the brain?
Dopamine is a Neurotransmitter as well as a Neurohormone. Its secretion is linked to increased heart rate and blood pressure. As released by the hypothalamus, it acts as an inhibitory hormone which stops the anterior pituitary gland from releasing prolactin. The lack of this Neurotransmitter causes several conditions, the most well known being Parkinson's Disease. An excess of this neurotransmitter has been linked with several psychiatric conditions such as schizophrenia, autism, and ADHD.
Name 2 endocrine glands and there location and function?
Two endocrine glands are the hypothalamus gland and the Thyroid. The hypothalamus gland is located in the center area of the brain. It's functions are to stimulate and inhibit the release and secretion of the anterior pituitary gland. The thyroid gland is located around the esophageal area and it's functions are to release thyroxine and triiodothyronine, also know as t4 and t3 and calcitonin. The release of these hormones stimulate the energy metabolism of all cell and inhibits the breakdown of bone; causing a decrease in blood calcium concentraion.
What is the most important part of the endocrine system?
Hormones and Glands. Glands: Hypothalamus Pituitary Pineal Thyroid Parathyroid Adrenal Heart Intestine Stomach Ovaries/testes Pancreas
How do feedback mechanisms control hormone production?
The hypothalamus releases hormones called releasing hormones. Some of the hormones they release also inhibit hormone release. So, the hypothalamus can either release:Releasing hormones, ORRelease inhibiting hormonesThese hormoens act on the aerior pituitary which ccuses the release oftrophic hrmones which are specific for target organs ie. Sex glands, thyroid glands, adrenal glands.The target glands release the hormone itself, which are called the non-trophic hormones. These hormones are responsible for causing a physiological effect. The hypothalamus is under the control of external stimulus ie. stress, the CNS, diet, and the immune system.Lots of things can control the release of releasing and release inhibitory hormones from the hypothalamus. At each level you have feedback inhibition. You get positive and negative input on the hypothalamus from outside the endocrine system and you get mostly negative influence on the hypothalamus from the anterior pituitary and the target organs.The trophic hormones can feedback and inhibit the hypothalamus. Even the physiological response to the hormone can feedback and affect target organs. This whole feedback loop is negative, but it can also be ostive. So, if hormone levels drop, or if stress increases, or diet changes, there will be a change in physiological response that will make feedback positive or negative to affect the hypothalamus.
What result would A drug designed to inhibit the response of cells to testosterone almost certainly result in?
Feminization of a male
Regulation of the release of T3 and T4 from the thyroid gland is controlled by negative feedback?
When the level of the thyroxine increase, the level of the thyroid stimulating hormone decrease. So in turn the level of the thyroid hormone decreases. When the level of the thyroxine decrease, the level of the thyroid stimulating hormone increase. This in turn increase the level of the thyroxine. This explanation does not explain to how the level of the hormone is regulated at that particular level. But then this explanation satisfy most of the people.
Is low testosterone level linked with decreased penis size?
If during puberty, a male has low testosterone, it COULD inhibit development of the penis, and other reproductive organs. However, low testosterone is a rare condition. However, just because someone has a below average sized penis, it does not indicate that they have low testosterone. Penis size is determined mostly by genetics.
