Proximal convoluted tubule
Proximal Convoluted Tubule
The Proximal Convoluted Tubule (PCT) is a part of the nephron that plays a crucial role in the process of urine formation in the kidney. It is the first part of the renal tubular system and is responsible for the reabsorption of about 65% of the glomerular filtrate.
Pronunciation
The term 'Proximal Convoluted Tubule' is pronounced as Prox-uh-muhl Kon-vuh-loo-ted Too-byool.
Etymology
The term 'Proximal Convoluted Tubule' is derived from Latin. 'Proximal' comes from 'proximus' meaning 'nearest', 'Convoluted' from 'convolutus' meaning 'rolled up', and 'Tubule' from 'tubulus' meaning 'small tube'.
Function
The primary function of the Proximal Convoluted Tubule is to reabsorb water and solutes from the filtrate and return them to the circulatory system. This includes glucose, amino acids, sodium, and chloride. It also secretes substances such as hydrogen ions, ammonia, and certain drugs into the filtrate.
Related Terms
- Nephron: The functional unit of the kidney, consisting of the glomerulus and the renal tubule.
- Glomerulus: A network of tiny blood vessels in the kidney where the filtration of blood takes place.
- Distal Convoluted Tubule: The portion of the nephron that lies beyond the loop of Henle and before the collecting duct system.
- Renal Tubule: The part of the nephron where the filtrate from the glomerulus is converted into urine.
See Also
External links
- Medical encyclopedia article on Proximal convoluted tubule
- Wikipedia's article - Proximal convoluted tubule
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