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3 years ago

Which structures greatly increase the surface area for nutrient absorption in the small intestines?

Biology

2 answers:

Scilla [17]3 years ago

7 0

Answer:

VILLI

Explanation:

maksim [4K]3 years ago

5 0

Answer: villi

Explanation:

In a human digestive system, small intestine is responsible for fat digestion. small intestine consist of small finger like projections called villi which functions the fat digestion by increasing the surface area for nutrient absortion.

The surface mucous-membranous layer protects the heart of a villus. This is composed mainly of two types of cells including columnar cells which absorb the substances passed into the blood and lymphatic vessels; and goblet cells, rounded at the end, which secrete mucus into the intestinal cavity.

Hence, villi increases the surfcae area for nutrient absorption in the small intestine.

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The soil matter formed by decade organic matter is called

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Answer:

the soil matter formed by decade organic matter is called humus.

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A student hypothesizes that a sample of rock formed from ocean sediments. which would best help the student support this hypothe

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The answer is would be -- Clam shells found within the rock sample.

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3 years ago

The number of cells in an average-sized adult human is on the order of 10^14 cells. Use this information, and the estimate that

KengaRu [80]

IF:
Number of cells: $C = 10^{14}$
DNA lenght: $D = 2m = 12.42 * 10^{-4} mi$
Distance from Earth to Sun: $ES=93000000 mi = 9.3* 10^{7}mi$

Then:
a) Over how many miles would the total DNA from the average human stretch?
The answer is product of multiplication of the number of cells (C) and the DNA length (D):
Total DNA: $T = C*D$
⇒ $T = 10^{14}*12.42* 10^{-4} mi$
⇒ $T = 12.42* 10^{14-4} mi$
⇒ $T = 12.42* 10^{10} mi$
The total DNA from the average human will stretch $12.42* 10^{10} mi$

b) How many times would the total DNA from the average human stretch from Earth to the Sun and back?
The answer is concluded from the ratio of the total DNA length (T) and the twice (because of stretch to the Sun and back, thus, two directions) of distance from Earth to the Sun (ES) and :
Ratio: $R= \frac{T}{2*ES}$
⇒ $R = \frac{12.42* 10^{10}mi }{2*(9.3* 10^{7}mi)}$
⇒ $R = \frac{12.42* 10^{10}}{18.6*10^{7}}$
⇒ $R = 0.6677* 10^{10-7}$
 ⇒ $R = 0.6677* 10^{3}$
 ⇒ [tex]R = 667.7
Thus, 667,7 times will the total DNA from the average human stretch from Earth to the Sun and back.

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3 years ago

What area would most likely experience the greatest amount of natural erosion.

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the area that would most likely experience the greatest amount of natural erosion is : the coastline When the waves crashed the coastline it will started a process called abration, when the land is detoriorated over time due to its friction with thewave The best method to prevene this is by planting mangroves near the coastline

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Why does conduction occur more easily in solids and liquids, than in gases?

blsea [12.9K]

Answer:

Because liquids and solids are denser than gasses.

Explanation:

Solids and liquids are denser than gasses making it easier for things like sound to conduct through them. Being dense contributes to a better conduction because the particles and such within the solid or liquid are closer together which allows for things like sound to travel at a much faster rate because they're so much easier to vibrate.

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3 years ago