導入細動脈
WordNet
- of nerves and nerve impulses; conveying sensory information from the sense organs to the CNS; "afferent nerves"; "afferent impulses"
- one of the small thin-walled arteries that end in capillaries (同)arteriola, capillary artery
PrepTutorEJDIC
- (神経・血管などが)求心性の(末梢(まっしょう)から中枢に向かうこと)
- 小動脈
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/04/30 09:02:11」(JST)
[Wiki en表示]
| Afferent arterioles |
Scheme of renal tubule and its vascular supply. (Label "Afferent vessel" is visible in upper left.)
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Distribution of bloodvessels in cortex of kidney.
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| Latin |
arteriola glomerularis afferens |
| Gray's |
p.1221 |
The afferent arterioles are a group of blood vessels that supply the nephrons in many excretory systems. They play an important role in the regulation of blood pressure as a part of the tubuloglomerular feedback mechanism.
The afferent arterioles branch from the renal artery, which supplies blood to the kidneys.
The afferent arterioles later diverge into the capillaries of the glomerulus.
Contents
- 1 Regulation
- 2 See also
- 3 Additional images
- 4 External links
Regulation
When renal blood flow is reduced (indicating hypotension) or there is a decrease in sodium and chloride ion concentration, the macula densa of the distal tubule releases prostaglandins, which cause the juxtaglomerular cells lining the afferent arterioles to release renin, activating the renin-angiotensin-aldosterone system, to increase blood pressure and increase reabsorption of sodium ions into the bloodstream via aldosterone.
The macula densa cell can also increase the local blood pressure of the afferent arterioles by increasing the synthesis of nitric oxide or decreasing the synthesis of adenosine or ATP.
If the afferent arterioles are constricted then the blood pressure in the capillaries of the kidneys will drop.
See also
- Efferent arteriole
- Tubuloglomerular feedback
- Macula densa
Additional images
External links
- Physiology at MCG 7/7ch03/7ch03p10 - "Renal Vasculature: Efferent Arterioles & Peritubular Capillaries"
- Organology at UC Davis Urinary/mammal/vasc0/vasc2 - "Mammal, renal vasculature (EM, Low)"
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Anatomy: urinary system (TA A08, TH H3.06, GA 11.1215)
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| Abdomen |
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Kidneys
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Layers
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- Renal fascia
- Renal capsule
- Renal cortex
- Renal medulla
- Renal sinus
- Renal pyramids
- medullary interstitium
- Renal lobe
- Cortical lobule
- Medullary ray
- Nephron
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Intrarenal arteries
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- Renal artery
- Segmental arteries
- Interlobar arteries
- Arcuate arteries
- Interlobular arteries
- Afferent arterioles
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Renal tubule
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- Renal corpuscle
- Glomerulus
- Bowman's capsule
- Proximal tubule
- Loop of Henle
- Descending
- Thin ascending
- Thick ascending
- Distal convoluted tubule
- Connecting tubule
- Collecting ducts aka Duct of Belini
- Renal papilla
- Minor calyx
- Major calyx
- Renal pelvis
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Intrarenal veins
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- Efferent arterioles
- Peritubular capillaries/Vasa recta
- Arcuate vein
- Interlobar veins
- Renal vein
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JGA
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- Macula densa
- Juxtaglomerular cells
- Mesangium/Extraglomerular mesangial cell
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Filtration
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- Glomerular basement membrane
- Podocyte
- Filtration slits
- Mesangium/Intraglomerular mesangial cell
- Tubular fluid
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Ureters
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- Orifice of ureter
- Adventitia
- Muscular layer
- Mucosa
- Ureteropelvic junction
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| Pelvis |
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Bladder
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- Apex
- Uvula
- Neck
- Median umbilical ligament
- Muscular layer
- Mucosa
- Submucosa
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Urethra
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- Urethral sphincters
- External sphincter muscle of male urethra
- External sphincter muscle of female urethra
- Internal sphincter muscle of urethra
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noco/acba/cong/tumr, sysi/epon, urte
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proc/itvp, drug (G4B), blte, urte
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UpToDate Contents
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English Journal
- Functional properties of submucosal venules in the rat stomach.
- Mitsui R1, Hashitani H.
- Pflügers Archiv : European journal of physiology.Pflugers Arch.2015 Jun;467(6):1327-42. doi: 10.1007/s00424-014-1576-1. Epub 2014 Jul 29.
- Venules in the stomach may have intrinsic properties for maintaining active microcirculation drainage even during gastric filling. Properties of spontaneous and nerve-mediated activity of submucosal venules in the rat stomach were investigated. Changes in vasodiameter and intracellular Ca(2+) in ven
- PMID 25066613
- KV 7.4 channels participate in the control of rodent renal vascular resting tone.
- Salomonsson M1, Brasen JC1,2, Braunstein TH3, Hagelqvist P1, Holstein-Rathlou NH1,3, Sorensen CM1.
- Acta physiologica (Oxford, England).Acta Physiol (Oxf).2015 May 12. doi: 10.1111/apha.12525. [Epub ahead of print]
- AIM: We tested the hypothesis that KV 7 channels contribute to basal renal vascular tone and that they participate in agonist induced renal vasoconstriction or vasodilation.METHODS: KV 7 channel subtypes in renal arterioles were characterized by immunofluorescence. Renal blood flow (RBF) was measure
- PMID 25965962
- Tubuloglomerular and connecting tubuloglomerular feedback during inhibition of various Na transporters in the nephron.
- Wang H1, D'Ambrosio MA1, Ren Y1, Monu SR1, Leung P1, Kutskill K1, Garvin JL2, Janic B1, Peterson EL3, Carretero OA4.
- American journal of physiology. Renal physiology.Am J Physiol Renal Physiol.2015 May 1;308(9):F1026-31. doi: 10.1152/ajprenal.00605.2014. Epub 2015 Feb 25.
- Afferent (Af-Art) and efferent arterioles resistance regulate glomerular capillary pressure. The nephron regulates Af-Art resistance via: 1) vasoconstrictor tubuloglomerular feedback (TGF), initiated in the macula densa via Na-K-2Cl cotransporters (NKCC2) and 2) vasodilator connecting tubuloglomerul
- PMID 25715987
Japanese Journal
- 糸球体微少循環の調節機構と治療 (特集 慢性腎臓病の進行機序と治療)
- Role of macula densa neuronal nitric oxide synthase in renal diseases
- TOJO Akihiro,ONOZATO Maristela Lika,FUJITA Toshiro
- Medical molecular morphology : official journal of the Japanese Society for Clinical Molecular Morphology 39(1), 2-7, 2006-03-01
- NAID 10020338216
- Role of angiotensin II and endogenous vasodilators in the control of glomerular hemodynamics
- ARIMA Shuji
- Clinical and experimental nephrology 7(3), 172-178, 2003-09-01
- NAID 10011993607
Related Links
- Afferent arteriole synonyms, Afferent arteriole antonyms. Information about Afferent arteriole in the free online English dictionary and encyclopedia. Printer Friendly Dictionary, Encyclopedia and Thesaurus - The Free Dictionary ? ...
- Afferent Arteriole Afferent Arteriole (1) Afferent glomerular arteriole, arteriola glomerularis afferens. (2) Any arteriole that connects the terminal branch of an artery with a capillary. arteriole a minute arterial branch. afferent arteriole enters ...
★リンクテーブル★
[★]
- 英
- afferent arteriole
- 関
- 導入細静脈
[★]
- 関
- afferent fiber、afferent fibre、afferent neuron、afferent pathway、afferents、centripetal、concentric、import、importation
[★]
- 関
- afferent、afferent pathway