Microvilli are the tiny projections in the cell lining the villi. It increases the surface area of absorption thereby increasing absorption.
Microvilli on the surface of epithelial cells such as those lining the intestine increase the cell’s surface area and thus facilitate the absorption of ingested food and water molecules. Microvilli are also sometimes called the intestinal brush border.
The combination of circular folds, villi and microvilli helps absorption by increasing the surface area of the small intestine by 30 to 600 times.
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Where the Brush border of small intestine cells is formed ?</h3>
The innermost layer lining the lumen of the alimentary canal is the mucosa. This layer forms irregular folds (rugae) in the stomach and small finger-like folding called villi in the small intestine.
The cells lining the villi produce numerous microscopic projections called microvilli giving a brush border appearance found on the apical surface of some epithelial cells. These modifications increase the surface area enormously and help in secretion and absorption.
Microvilli are covered in the plasma membrane, which encloses cytoplasm and microfilaments. Though these are cellular extensions, there are little or no cellular organelles present in the microvilli. Hence, the brush border of small intestine cells is formed of microvilli.
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'Although concrete operational thinkers might succeed on the balance-a-scale test of formal reasoning, they are less likely to do so because of their reliance on <u>trial and error</u>.
An operational definition is a definition that defines the precise way wherein a variable is measured. Giving the steps used in defining each variable allows others to evaluate and potentially mirror research take a look at.
Your operational definitions describe the variables you may use as indicators and the processes you will use to study or degree them. You need an operational definition due to the fact you can not measure something without one, regardless of how top your conceptual definition is probably.
An operational definition of a variable is the set of approaches used to measure or control it. a great operational definition is obviously sufficient so that an unbiased researcher ought to use the same technique (mirror the studies) and get identical outcomes.
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Answer:
The most compelling theory is that the birth of agriculture was facilitated by the end of the last glacial period, from 15,000 to 10,000 years ago (depending on the world region), which coincides with the era when agriculture first started.
The end of the last glacial period brought a warmer climate to many areas of the world, which meant that weather and soil conditions where more favorable for the cultivation of wild plants, and the domestication of animals.
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