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tia_tia [17]
3 years ago
6

Why do sodium ions need channels in order to move into and out in f cells?

Biology
1 answer:
murzikaleks [220]3 years ago
3 0

Answer:

Firstly they are too big to pass through the natural pores of the cell membrane the way water molecules do through aquaporins. Secondly, they would not pass through the hydrophobic layer of the cell membrane because the sodium ions are charged. This is because the hydrophobic layer does not interact positively with charged molecules/ions. Additionally, because sodium ions would be traveling up the concentration gradient into the cell, there is need for active transport. The channels proteins are able to harness energy from ATP to actively transport the sodium ions into the cell.

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Class ii mhc proteins are found on which of the following cell types?
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Answer:

The answer to the question: Class II MHC proteins are found on which of the following cell types, would be: on macrophages and lymphocytes, particularly T-Cells.

Explanation:

MHC, or Major histocompatibility complex, is a very important part of the immune response that the body gives against an invading pathogen, or other foreign substances. There are three types in the human body, Class I, Class II and Class III and each of them will play a role on the cellular membrance of different types of cells and mediate different types of responses. In the human body, this histocompatibility complex is best known as HLA, or human leukocyte antigen, and it will ensure the recognition, or non-recognition of substances, tissues, and other organisms, by the human immune system. Class II, as mentioned before, are most usually found on the immune cells macrophages and lymphocytes, and they are the ones responsible for presenting antigens to these proteinic antibodies so that the immune cells can initiate a proper immune response.

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3 years ago
Sarah has experienced brain damage making it difficult for her to understand spatial layout. which area of her brain has most li
Nataly_w [17]
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What are the two main divisions of the nervous system called?
rjkz [21]

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3 years ago
Jonathan used the following soil triangle to identify a sample of soil as sandy clay.
sineoko [7]

The description of soil according to Jonathan is as follows:

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<h3>What is Soil Texture?</h3>

Soil texture may be defined as a classification of soil on the basis of its physical appearance, texture, and properties.

In this question, the texture and composition of other soil are illustrated briefly with respect to each common soil type.

Therefore, it is well described above.

To learn more about Soil texture, refer to the link:

brainly.com/question/946875

#SPJ1

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What would be the complimentary strand for the DNA sequence <br> ATAACGA
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I believe it is TATTGCT
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