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The renin–angiotensin system ( RAS ), or renin–angiotensin–aldosterone system ( RAAS ), is a hormone system that regulates blood pressure, fluid and electrolyte balance, and systemic vascular resistance. [ 2][ 3] When renal blood flow is reduced, juxtaglomerular cells in the kidneys convert the precursor prorenin (already present in the ...
Endocrine system. The endocrine system[ 1] is a messenger system in an organism comprising feedback loops of hormones that are released by internal glands directly into the circulatory system and that target and regulate distant organs. In vertebrates, the hypothalamus is the neural control center for all endocrine systems.
Norepinephrine ( NE ), also called noradrenaline ( NA) or noradrenalin, is an organic chemical in the catecholamine family that functions in the brain and body as a hormone, neurotransmitter and neuromodulator. The name "noradrenaline" (from Latin ad, "near", and ren, "kidney") is more commonly used in the United Kingdom, whereas ...
Adrenaline, also known as epinephrine, is a hormone and medication [ 7][ 8] which is involved in regulating visceral functions (e.g., respiration). [ 7][ 9] It appears as a white microcrystalline granule. [ 10] Adrenaline is normally produced by the adrenal glands and by a small number of neurons in the medulla oblongata. [ 11]
Gonadotropins are released under the control of gonadotropin-releasing hormone (GnRH) from the arcuate nucleus and preoptic area of the hypothalamus. The gonads — testes and ovaries — are the primary target organs for LH and FSH. The gonadotropins affect multiple cell types and elicit multiple responses from the target organs.
Crash Course is an American game show that premiered on ABC on August 26, 2009. It is hosted by Orlando Jones and Dan Cortese . The series has teams of two competing for a golden steering wheel and $50,000.
Adrenocortical hormone. In humans and other animals, the adrenocortical hormones are hormones produced by the adrenal cortex, the outer region of the adrenal gland. These polycyclic steroid hormones have a variety of roles that are crucial for the body's response to stress (for example, the fight-or-flight response ), and they also regulate ...
The system of the thyroid hormones T 3 and T 4 [10] T 3 and T 4 are carried in the blood, bound to plasma proteins. This has the effect of increasing the half-life of the hormone and decreasing the rate at which it is taken up by peripheral tissues. There are three main proteins that the two hormones are bound to.