Distal convoluted tubules
Distal Convoluted Tubule
The Distal Convoluted Tubule (pronounced: dis-tal kon-vuh-loot-ed too-byool), often abbreviated as DCT, is a portion of the nephron in the kidney that plays a crucial role in the reabsorption of ions, water, and other substances.
Etymology
The term "Distal Convoluted Tubule" is derived from Latin. "Distal" means "farthest", "Convoluted" means "twisted", and "Tubule" means "small tube".
Function
The primary function of the DCT is to absorb ions, water, and other substances from the glomerular filtrate, returning them to the bloodstream. The DCT also plays a role in maintaining the body's pH balance by absorbing bicarbonate ions and secreting hydrogen ions.
Structure
The DCT is a highly coiled tubular structure that extends from the Loop of Henle. It is lined with cells that have numerous mitochondria, which provide the energy needed for active transport of ions and other substances.
Related Terms
- Nephron: The functional unit of the kidney, consisting of the glomerulus, proximal convoluted tubule, Loop of Henle, and distal convoluted tubule.
- Loop of Henle: A portion of the nephron that plays a key role in the concentration of urine.
- Glomerular Filtrate: The fluid that is filtered out of the blood by the glomerulus.
- Proximal Convoluted Tubule: The first segment of a nephron, which reabsorbs nutrients from the glomerular filtrate back into the bloodstream.
External links
- Medical encyclopedia article on Distal convoluted tubules
- Wikipedia's article - Distal convoluted tubules
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