PMID: 7030087Nov 1, 1981Paper

Comparative physiology of insect renal function

The American Journal of Physiology
J E Phillips

Abstract

Transport mechanisms and their control in various segments of insect excretory systems are reviewed and compared to those of vertebrate nephrons, exocrine glands, and hindguts. Formation of the primary urine in most insect Malpighian tubules (MT) is by isosmotic secretion, which is driven by an apical cation (K+) pump rather than by Na+-K+-ATPase. Unlike the glomerular filtrate of vertebrates, insect MT fluid is very different from the blood in composition, often having very high K+-to-Na+ ratios, and urine-to-plasma values much less than unity for most other solutes. The total surface area of insect MT is some 20 times that of vertebrate glomeruli per unit body weight. Secretion of MT fluid is regulated by neuropeptides over a wide range of rats, similar to glomerular filtration rate values for many vertebrate kidneys. Several secretory mechanisms for selected solutes are probably common to insect and vertebrate tubules. Unlike vertebrates, insects usually reabsorb most of the filtered water, ions, and metabolites in the rectum, which has a small surface area relative to the MT. The rectum is also where ionic and osmotic composition of the excreta is finally adjusted, under the control of neuropeptide hormones. In the rectum, ...Continue Reading

Citations

Sep 28, 2017·The Journal of Experimental Biology·Mads Kuhlmann AndersenJohannes Overgaard
Jan 24, 2018·The Journal of Experimental Biology·Lucie Gerber, Johannes Overgaard
Dec 9, 2000·Annual Review of Entomology·J F Harrison
Nov 22, 2002·American Journal of Physiology. Cell Physiology·Edward M Blumenthal
Dec 17, 2009·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Juan P IanowskiIan Orchard
Jul 1, 2005·American Journal of Physiology. Cell Physiology·Edward M Blumenthal
Jan 19, 2020·The Journal of Experimental Biology·Mads Kuhlmann Andersen, Johannes Overgaard
Jun 14, 2020·The Journal of Experimental Biology·Kaylen Brzezinski, Heath A MacMillan
Sep 2, 2017·The Journal of Experimental Biology·Fargol NowghaniScott P Kelly
Mar 7, 2021·Current Opinion in Insect Science·Johannes OvergaardMads Kuhlmann Andersen
Jan 17, 2012·The Journal of Experimental Biology·Kenneth Agerlin Halberg, Nadja Møbjerg

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