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cortex[kor´teks] (pl. cor´tices) (L.)
the outer layer of an organ or other structure, as distinguished from its inner substance or medulla. adj., adj cor´tical.
adrenal cortex (cortex of adrenal gland) the outer, firm layer comprising the larger part of the adrenal gland; it secretes mineralocorticoids, androgens, and glucocorticoids.
cerebral cortex (cortex cerebra´lis) the convoluted layer of gray matter covering each cerebral hemisphere. See also brain.
renal cortex the granular outer layer of the kidney, composed mainly of glomeruli and convoluted tubules, extending in columns between the pyramids that constitute the renal medulla.
striate cortex part of the occipital lobe that receives the fibers of the optic radiation and serves as the primary receiving area for vision. Called also first visual area.
cortex of suprarenal gland[TA]
the outer part of the adrenal gland, consisting of three zones from without inward: zona glomerulosa, zona fasciculata, and zona reticularis; this part of the adrenal cortex yields steroid hormones such as corticosterone, deoxycorticosterone, and estrone.
The outer portion of the adrenal glands that produces several steroid hormones, including cortisol and aldosterone.
Etymology: L, ad, to, ren, kidney
the outer and greater portion of the adrenal gland, fused with the gland's medulla. In response to adrenocorticotropic hormone secreted by the adenohypophysis, it secretes cortisol and androgens. Adrenal androgens serve as precursors that are converted by the liver to testosterone and estrogens. Renin from the kidney controls adrenal cortical production of aldosterone. Compare adrenal medulla. adrenocortical, adj.
Adrenal CortexThe firm, outer yellow layer of the adrenal gland which is derived from embryonic mesoderm and consists of 3 layers:
• Zona glomerulosa, the outermost layer, which secretes mineralocorticoids, primarily aldosterone
• Zona fasciculata, the middle layer, which secretes glucocorticoids, primarily cortisol, both at baseline levels and in bursts, when so commanded by ACTH from the anterior pituitary gland
• Zona reticularis, the innermost layer, which secretes androgens, primarily dehydroepiandrosterone (DHEA) and DHEA sulfate (DHEA-S).
adrenal cortexThe outer zone of the ADRENAL GLAND that secretes CORTISOL, sex hormones (ANDROGENS) and ALDOSTERONE. See also ADRENAL MEDULLA.
The outer tissue of the adrenal gland. It produces a group of chemically related hormones called corticosteroids that control mineral and water balance in the body and include aldosterone and cortisol.
Mentioned in: Adrenal Gland Scan
cor·tex of su·pra·re·nal gland(kōrteks sūpră-rēnăl gland) [TA]
The outer part of the suprarenal gland.
Synonym(s): adrenal cortex.
Synonym(s): adrenal cortex.
adrenal cortex (ədrē´nəl kor´teks),
n the greater portion of the adrenal gland fused with the gland's medulla and producing mineralocorticoids, androgens, and glucocorticoids, hormones essential to homeostasis. The outer cortex is normally a deep yellow; the inner part is dark red or brown.
1. near the kidney.
2. of or produced by the adrenal glands.
3. an adrenal gland.
the outer part of the adrenal gland made up of an external zona glomerulosa, a deeper zona fasciculata and a zona reticularis. It produces three main groups of hormones, the glucocorticoids which are concerned with increasing blood glucose levels, the mineralocorticoids concerned with the maintenance of electrolyte levels in the extracellular fluid, and androgens which have the same masculinizing effect as the hormone testosterone produced by the testis. Called also adrenal gland cortex. See glucocorticoid, mineralocorticoid, androgen.
adrenal cortex inhibitors
adrenal hyperplasia-like syndrome
a congenital abnormality of adrenal steroidogenesis reported in dogs which results in hyperprogestinism and hyperandrogenism. Clinical signs include bilaterally symmetrical alopecia resembling that seen with other endocrinopathies.
hypofunction of the adrenal gland, particularly the cortex, leading to signs of weakness and loss of sodium, chloride and water. See also primary hypoadrenocorticism.
a glandular extension of the effector fibers of the sympathetic nervous system that releases into the bloodstream the hormones epinephrine (adrenaline) and norepinephrine (noradrenaline). When the sympathetic nervous system is stimulated the adrenal medulla responds also and its hormones are carried via the bloodstream to cause increases in cardiac output and metabolic rate, vasoconstriction and reduction of gastrointestinal peristalsis. The hormones have similar functions but epinephrine is removed from the bloodstream more slowly and has a more prolonged effect. Called also adrenal gland medulla.
Adrenal medullary hormones are not essential to life. Hypersecretion, such as occurs in some functional pheochromocytomas, causes tachycardia, edema and cardiac hypertrophy.
cortisol, corticosterone, cortisone, 11-dehydroxycortisone, desoxycorticosterone, 17-hydroxy-11-desoxycorticosterone, aldosterone, the adrenal corticoids from the adrenal cortex. Called also corticosteroids.
pl. cortices [L.] an outer layer, as the bark of the trunk or root of a tree, or the outer layer of an organ or other structure, as distinguished from its inner substance.
the superficial gray matter of the cerebellum.
cerebral cortex, cortex cerebri
the convoluted layer of gray matter covering each cerebral hemisphere. See also cerebral cortex.
the smooth-textured outer layer of the kidney, composed mainly of renal corpuscles and convoluted tubules, extending in columns between the pyramids.