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Helen [10]
3 years ago
8

Which of the following describes tight junctions?

Biology
2 answers:
Cerrena [4.2K]3 years ago
5 0

A. Cell junctions in areas are subjected to great mechanical stress, such as the skin and heart muscles

stiks02 [169]3 years ago
3 0

Answer:

Junctions among epithelial cells lining the digestive tract. (Ans. B)

Explanation:

Tight junction are defined as a barrier is form where the membrane of two adjacent cells join together. Cell membrane of two adjacent cells connected by two main proteins claudins and occludins (trans-membrane proteins).

Tight junction helping to prevent molecules to passing between the cells and helping to maintain the polarity present in the cell with the help of bind cells together.

Tight junction have several functions:

1) Tight junction are present in the epithelial cells, these cells lines the body cavity and the surface which is present in the body. They are helping to separate epithelial cells from the nearby environment and also helping to separate from the surface which is present in the body.

2) Most important function of the tight junction is to help in forming a barrier which prevent molecules from moving around.

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What is gained from each part of aerobic respiration?
Aneli [31]

Answer:

Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. ... This results in a net gain of two ATP molecules. Life first evolved in the absence of oxygen, and glycolysis does not require oxygen.

<h2><em><u>Hope this helps..</u></em></h2>
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3 years ago
Which of the following is not one of the three main types of human waste
astraxan [27]
The answer is C oxygen.

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The excessive concentrations of circulating parathyroid hormone appeared to be caused by a tumor of the parathyroid gland or ___
Reika [66]

Answer:

parathyroidoma

Explanation:

The condition where the parathyroid hormone is produces excessively is termed as Hyperparathyroidism. This condition arises when the balance between the calcium and phosphorus gets disturbed. The calcium and phosphorus balance is affected in following two cases –  

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4 0
3 years ago
In natural selection what must be true of traits that are passed down through generationsal selection where do the alleles or tr
goblinko [34]
I'm not sure if I will answer the question you asked, as I many have interpreted it incorrectly. In natural selection, there must be variance in the gene pool, the total frequency of alleles in a population. Now, one of the organisms may have a gene that somehow helps them survive from the selective force much better compared to the others. If this does happen, over time the gene pool will narrow down to become just the genes of that organism that survived better in the first place because the rest would be taken care of by the selective force. So, the alleles and trait come from the first organisms that had the advantage over the others of its species.
3 0
3 years ago
Give an example of two types of cells that never go through cell division once fully formed.
AnnyKZ [126]

Answer:

The two types of cells that never go through cell division once fully formed are nerve cells and muscle cells.

Explanation:

The nerve cells and the muscle cells not undergo cell division after formation, because they can never re grow or cannot be repaired once they are mature. We should take good care of it once they are matured. They just under division from being baby to teenagers after that they stop undergoing cell division. This is true for both elephants as well as human beings. This thing is also applicable in case of bones.

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3 years ago
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