Medullary Region
Medullary Region - Related Videos
06:11
Culturing Primary Rat Inner Medullary Collecting Duct Cells
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Cited by 20 •
2013
Arginine-vasopressin (AVP) controls fine-tuning of body water homeostasis through facilitating water reabsorption by renal principal cells. Here, we present a protocol for the cultivation of primary rat inner medullary collecting duct cells suitable for the elucidation of molecular mechanisms underlying AVP-mediated water reabsorption.
03:26
Detrusor Underactivity Model in Rats by Conus Medullaris Transection
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Cited by 2 •
2020
We present a method for establishing a detrusor underactivity model by conus medullaris transection in rats. Detrusor underactivity was successfully stimulated in these animals. The model can be used for studying urinary tract function.
06:47
3D Organotypic Co-culture Model Supporting Medullary Thymic Epithelial Cell Proliferation, Differentiation and Promiscuous Gene Expression
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Cited by 15 •
2015
Studying medullary thymic epithelial cells in vitro has been largely unsuccessful, as current 2D culture systems do not mimic the in vivo scenario. The 3D culture system described herein - a modified skin organotypic culture model - has proven superior in recapitulating mTEC proliferation, differentiation and maintenance of promiscuous gene expression.
01:03
IR Frequency Region: Fingerprint Region
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2024
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1. The...
02:40
The Eukaryotic Promoter Region
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2020
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
FAQs
Its loops of Henle, collecting ducts, and associated blood vessels work together to establish and maintain an osmotic gradient within the kidney. That gradient provides the conditions for water reabsorption as filtrate passes through the medulla. By supporting this process, the region allows urine to become more concentrated while contributing to regulation of overall fluid balance.
Renal pyramids organize the loops of Henle, collecting ducts, and associated blood vessels into the medulla. This arrangement links the structures that establish the osmotic gradient with the ducts involved in water reabsorption. Examining the pyramids therefore helps connect kidney anatomy with the physiological outcomes of urine concentration, electrolyte regulation, and waste excretion.
The gradient allows the kidney to adjust how much water remains in the forming urine. This affects fluid balance and helps maintain appropriate electrolyte levels while waste is excreted. If the gradient or the structures that support it are disrupted, the kidney may lose efficiency in concentrating urine, which can interfere with the body's internal homeostasis.
The two regions are distinguished by their organization and functions within the organ. In the kidney, the medulla contains the renal pyramids and structures associated with establishing the osmotic gradient and reabsorbing water. Comparing these regions helps biologists relate anatomical differences to specialized roles in renal physiology rather than treating the kidney as uniform tissue.
Analysis should focus on the renal pyramids and the presence and organization of loops of Henle, collecting ducts, and associated blood vessels. These features are directly tied to the medulla's osmotic gradient and water-reabsorption functions. Their arrangement can provide a basis for interpreting normal renal organization and recognizing tissue abnormalities that may affect kidney performance.
Medullary organization provides a structural framework for interpreting how the kidney regulates fluids, electrolytes, and waste. In research and tissue assessment, examining this region can help identify abnormalities and investigate diseases that impair urine concentration. The same anatomical context connects microscopic changes with broader disruptions of renal physiology and internal homeostasis.