Dictionary » E » Excretion




(1) The process, act or function of discharging or ejecting waste product of metabolism, especially from the system of an organism.

(2) The excreta, or the waste material eliminated by excretion.


Word origin: Latin excrētiōn- (s. of excrētiō) that which is sifted out.
Related forms: excrete (verb)

Compare: secretion

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... production but a survival meachanism for brain and muscles. In alanine, additional energy should be spent over deaminase, urea synthesis and excretion. Kidneys may lack these enzymes or lesser efficient isoforms, subcellular oragnaells than liver. The extra energy spent for nitrogen removal ...

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by balamurugan3
Wed Aug 07, 2013 9:57 pm
Forum: Cell Biology
Topic: Gluconeogenesis
Replies: 8
Views: 9364

DNA and Protein Synthesis

... of a cell, explain briefly how it and the nucleus control most of the cells activity like growth, repair, cellular respiration, secretion, and excretion. ^ The mRNA carries the genetic information of the DNA to the ribosomes in the cytoplasm and tells them what to do. It makes protein and functions ...

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by Ayeshaa
Mon Feb 27, 2012 11:56 pm
Forum: Genetics
Topic: DNA and Protein Synthesis
Replies: 2
Views: 7955

What about breastfeeding and weak bases

... than in plasma. Conversely, drugs that are weak acids will be present in breast milk at a much lower concentration than in the plasma. To increase excretion: change the urinary pH to favor the charged form of the drug: Weak acids: excreted faster in alkaline pH (anion form favored) Weak bases: ...

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by awollow
Wed Feb 01, 2012 8:02 am
Forum: Physiology
Topic: What about breastfeeding and weak bases
Replies: 0
Views: 2732

Urine formation

... A. Concentrated urine is produced under the control of antidiuretic hormone. B. The total volume of urine produced depends on the need for water excretion. C. If there is an excess intake of water, dilute urine is excreted. D. If there is a shortage of water in the body the volume of urine produced ...

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by chikis
Tue Nov 08, 2011 2:42 pm
Forum: Physiology
Topic: Urine formation
Replies: 7
Views: 8328

Entropy, potential energy and energy transduction

I think since it's a biochem course you should be discussion the relevant chemicals involved in the activities etc e.g. excretion : Potential energy : ATP in the body is required to power the excretion machinery. A good example would be the nephrons and kidneys especially the osmolarity ...

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by mith
Thu May 26, 2011 10:46 pm
Forum: Molecular Biology
Topic: Entropy, potential energy and energy transduction
Replies: 2
Views: 4134
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