Afferent arterioles
| Afferent arterioles | |
|---|---|
glomerular capillaries | |
| Identifiers | |
| Latin | arteriola glomerularis afferens |
| TA98 | A08.1.03.005 |
| FMA | 272216 77042, 272216 |
| Anatomical terminology] | |
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.
Regulation
When renal blood flow is reduced (indicating
renin–angiotensin–aldosterone system, to increase blood pressure and increase reabsorption of sodium ions into the bloodstream via aldosterone.[1]
The macula densa cell can also increase the blood pressure of the afferent arterioles by decreasing the synthesis of adenosine or ATP.[1]
If the efferent arterioles are constricted then the blood pressure in the capillaries of the kidneys will increase.
See also
Additional images
-
Malpighian corpuscle. -
Glomerulus. -
Renal corpuscle
References
- ^ PMID 20360309.
External links
- Nosek, Thomas M. "Section 7/7ch03/7ch03p10". Essentials of Human Physiology. Archived from the original on 2016-03-24. - "Renal Vasculature: Efferent Arterioles & Peritubular Capillaries"
- Anatomy photo: Urinary/mammal/vasc0/vasc2 - Comparative Organology at University of California, Davis - "Mammal, renal vasculature (EM, Low)"
