Connecting tubule

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search
Connecting tubule
Gray1128.png
Scheme of renal tubule and its vascular supply.
Details
PrecursorMetanephric blastema
Identifiers
Latintubulus renalis arcuatus
Anatomical terminology

In the kidney, the connecting tubule (CNT, or junctional tubule, or arcuate renal tubule) is a tubular segment of the renal collecting duct system that connects the distal convoluted tubule to the cortical collecting duct.

Structure[edit]

Many sources include the connecting tubule as part of the collecting duct system. However, the embryological origin is more similar to the nephron than it is to the rest of the collecting duct (which derives from the ureteric bud), and other sources therefore classify the connecting tubule with the nephron.

Some connecting tubules, usually associated with juxtamedullary nephrons, arch upwards before reaching the cortical collecting ducts. It is this "arcuate" feature which gives the tubule its alternate name.

Function[edit]

It participates in the regulation of water and electrolytes, including sodium, and chloride.

The CNT is sensitive to both isoprotenerol (more so than the cortical collecting ducts) and antidiuretic hormone (less so than the cortical collecting ducts), the latter largely determining its function in water reabsorption.

References[edit]


Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.


As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).
  • Lua error in Module:Citation/CS1 at line 925: attempt to concatenate local 'str' (a table value).
  • Imai M (1979). "The connecting tubule: a functional subdivision of the rabbit distal nephron segments". Kidney Int 15 (4): 346–56. doi:10.1038/ki.1979.46. PMID 513494.

External links[edit]

ja:集合管