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The adrenal glands measure approximately 5 cm in length, 3 cm in width, and up to 1 cm in thickness. [9] Their combined weight in an adult human ranges from 7 to 10 grams. [10] The glands are yellowish in colour. [8] The adrenal glands are surrounded by a fatty capsule and lie within the renal fascia, which also
The adrenal medulla is the principal site of the conversion of the amino acid tyrosine into the catecholamines; epinephrine, norepinephrine, and dopamine. Because the ANS, specifically the sympathetic division, exerts direct control over the chromaffin cells , the hormone release can occur rather quickly. [ 2 ]
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The adrenal cortex is the outer region and also the largest part of the adrenal gland. It is divided into three separate zones: zona glomerulosa, zona fasciculata and zona reticularis. Each zone is responsible for producing specific hormones. It is also a secondary site of androgen synthesis. [2]
Diagram showing the position of the adrenal glands. Date: 30 July 2014 (released by CRUK) Source: Original email from CRUK: Author: Cancer Research UK: Permission (Reusing this file) This image has been released as part of an open knowledge project by Cancer Research UK. If re-used, attribute to Cancer Research UK / Wikimedia Commons
Waterhouse–Friderichsen syndrome (WFS) is defined as adrenal gland failure due to hemorrhages in the adrenal glands, commonly caused by sepsis. Typically, the bacteria responsible for triggering the bleeding is Neisseria meningitidis. [1] The bacterial infection leads to massive bleeding into one or both adrenal glands. [2]
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 other functions in the body.
The adrenal cortex, situated along the perimeter of the adrenal gland; mediates the stress response through the production of various hormones; The thymic cortex [broken anchor], mainly composed of lymphocytes; functions as a site for somatic recombination of T cell receptors, and positive selection