Regurgitation (digestion)

From WikiMD free medical encyclopedia
Jump to: navigation, search
File:Flesh fly concentrating food.jpg
Flesh fly, from the Sarcophagidae family "blowing a bubble". One explanation for this behaviour is that it concentrates the fly's meal by evaporation. The diet of the flesh fly is very high in water content. The fly regurgitates the liquid portion of the food, holds it whilst evaporation reduces the water content and the fly then swallows a much more concentrated food meal without the water content. This continues until sufficient amount of liquid is left for the fly. - Australian Museum

Regurgitation is the expulsion of material from the pharynx, or esophagus, usually characterized by the presence of undigested food or blood.[1]

Regurgitation is used by a number of species to feed their young.[2] This is typically in circumstances where the young are at a fixed location and a parent must forage or hunt for food, especially under circumstances where the carriage of small prey would be subject to robbing by other predators or the whole prey is larger than can be carried to a den or nest. Some bird species also occasionally regurgitate pellets of indigestible matter such as bones and feathers.[3]

It is in most animals a normal and voluntary process unlike the complex vomiting reflex in response to toxins. Honey is produced by a process of regurgitation by honey bees, which is stored in the beehive as a primary food source.

In humans

In humans it can be voluntary or involuntary, the latter being due to a small number of disorders. Regurgitation of a person's meals following ingestion is known as rumination syndrome, a rarely diagnosed eating disorder. It may be a symptom of gastroesophageal reflux disease (GERD).[4]

A subset of people, most current or former bulimics, are able to regurgitate without using any external stimulation or drug, by means of muscle control.[5] Practitioners of yoga have also been known to do this.[6] Professional regurgitators perfect the ability to such a degree as being able to exploit it as entertainment.[7][8]

In animals

File:Moorhen feeding chick.jpg
Moorhen chick being fed regurgitated food by an adult

Birds often employ regurgitation to feed their young. In the Blue-footed Booby, the chicks feed on regurgitated fish from their parents. Only one chick can feed at a time using this method, so there is always the emergence of a brood hierarchy. The dominant chick, who is usually older, is almost always fed before the subordinate, younger chick, and so in times of food hardship, siblicide may occur, where the dominant chick kills its younger sibling in order to sequester all his parents' resources.[9]

Regurgitation as a method of feeding is also seen in the Red-collared Widowbird.

Gallery

References

  1. Nelson, R.W. and C. G. Couto. Small Animal Internal Medicine, 4th ed. 2009.
  2. {{#invoke:citation/CS1|citation |CitationClass=book }}
  3. {{#invoke:citation/CS1|citation |CitationClass=book }}
  4. Chari, C. T. K. (1973) '"Regurgitation, mediumship and yoga." Journal of the Society for Physical Research 47, 757, 156
  5. {{#invoke:citation/CS1|citation |CitationClass=book }}

Metabolic.jpg

Featured disease - metabolic syndrome is a cluster of medical problems that raises your risk for heart disease and other health problems, such as diabetes and stroke. Affecting about 35 percent of all adults in the United States according to the CDC, metabolic syndrome contributes to weight gain, by causing a state of internal starvation called metabolic starvation. This in turn leads to increases hunger, sugar cravings and increased portions.

Cause and effect misunderstood

Since we traditionally thought that the portion control (which in turn was attributed wrongly to poor will power)is the cause of weight gain, rather than the effect of this metabolic starvation, all our traditional ideas about cause and effect of obesity were not only wrong but lead to the “blame the victim” attitude when it comes to obesity.

Secret of weight gain revealed

Secret of weight gain, and metabolic syndrome revealed - it has been recently proven that metabolic syndrome, and the weight gain itself are caused by a process called insulin resistance. Check your metabolic syndrome risk using the free Metabolic syndrome meter


See also

Calories and Nutritional Information of Foods


Heart-greens-1000.jpg

Nutritional value of foods: UK Foods | US Foods | Dietary Supplements | Nutrition values of foods Portions of content adapted from Wikipedia's article on the same topic licensed under GNU FDL.

WikiMD Sponsors - W8MD Weight Loss, Sleep and MedSpa Centers

Pronounced weightMD, our state of the art W8MD weight loss, sleep, holistic IV nutrition and aesthetic medicine programs can help you not only to lose weight, and sleep better but also look your best! Since its inception in 2011, W8MD’s insurance physician weight loss program has successfully helped thousands of patients.

W8MD Weight Loss

W8MD’s Physician weight loss is unique in many ways with a comprehensive multidisciplinary approach to weight loss. Weight Loss Success Stories....

W8MD Sleep Services

Sleep medicine program uses state of the art technology to diagnose and treat over 80 different sleep disorders. W8MD Sleep Services…

W8MD Medical Aesthetic Services

Medical aesthetic program offers a wide variety of advanced laser skin treatments including oxygen super facials, photofacials and Affordable Botox. W8MD Aesthetic Services…

IM and IV nutrition therapy includes booster shots for B12, vitamin B complex, Vitamin C, Detox treatments and IV nutrition therapy. W8MD IV Nutrition…

W8MD weight loss | Philadelphia medical weight loss | NYC medical weight loss | NJ medical weight loss

W8MD Weight Loss, Sleep & Medical Aesthetics

Intro to W8MD Weight Loss, Sleep & Medical Aesthetics


Disclaimer: The entire contents of WIKIMD.ORG are for informational purposes only and do not render medical advice or professional services. If you have a medical emergency, you should CALL 911 immediately! Given the nature of the wiki, the information provided may not be accurate and or incorrect. Use the information on this wiki at your own risk! See full Disclaimers.WikiMD is supported by W8MD Weight loss, Poly-Tech Sleep & Medical Aesthetic Centers of America.