T-tubule - definition. What is T-tubule
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T-tubule         
INVAGINATION OF THE PLASMA MEMBRANE OF A MUSCLE CELL THAT EXTENDS INWARD FROM THE CELL SURFACE AROUND EACH MYOFIBRIL; THE ENDS OF T-TUBULES MAKE CONTACT WITH THE SARCOPLASMIC RETICULUM MEMBRANE
T tubules; T-tubules; Transverse tubules; T tubule; Transverse tubular system; Transverse tubule; T-Tubule; A-I junction
T-tubules (transverse tubules) are extensions of the cell membrane that penetrate into the centre of skeletal and cardiac muscle cells. With membranes that contain large concentrations of ion channels, transporters, and pumps, T-tubules permit rapid transmission of the action potential into the cell, and also play an important role in regulating cellular calcium concentration.
Proximal tubule         
  • Proximal tubule cell showing pumps involved in acid base balance, left is the lumen of tubule
  • [[Immunohistochemical staining]] of the '''convoluted tubules''' and [[glomeruli]] with [[CD10]]
KIDNEY STRUCTURE
Proximal convoluted tubules; Proximal convoluted tube; Kidney tubules, proximal; Proximal tubular; Proximal straight tubule; Kidney proximal tubule brush border cell; Renal proximal tubule brush border cell; Proximal convoluted tubule cell; Proximal tubule cell; Renal proximal tubule; Pars recta; Pars convoluta; Proximal renal tubule; Tubulus contortus proximalis; Proximal convoluted tubule; Kidney proximal tubule brush border cells; Proximal tubule brush border cells; Proximal tubule brush border cell; Proximal tubules
The proximal tubule is the segment of the nephron in kidneys which begins from the renal pole of the Bowman's capsule to the beginning of loop of Henle. It can be further classified into the proximal convoluted tubule (PCT) and the proximal straight tubule (PST).
Malpighian tubule system         
  • Malpighian tubules of a dissected cockroach, indicated by yellow arrow. Scale bar, 2 mm.
EXCRETORY AND OSMOREGULATORY SYSTEM
Malpighian tubule; Malphigian tubule system; Malpighian tubules; Malphigian tubules; Malpighian tuble system; Malpighian tubes; Malphigian tubes; Malphigian tubule
The Malpighian tubule system is a type of excretory and osmoregulatory system found in some insects, myriapods, arachnids and tardigrades.