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Serhud [2]
3 years ago
7

The cell membrane forms a protective barrier between the external and internal environments. It is referred to as ______________

_____, because it allows some substances to cross more easily than others and blocks other substances from crossing into the cell.
Biology
2 answers:
Murljashka [212]3 years ago
5 0

The answer would be  D) selectively permeable.

nikklg [1K]3 years ago
3 0

The right answer is D) selectively permeable.

Biological membranes only let certain molecules or ions pass, and not at the same speed. This selective permeability is the result of differential passive permeability, which more or less limits the crossing of particles driven by osmotic and electrostatic forces, and biological permeability or permeation, which ensures active transport by enzymatic mechanisms.

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Autoantibodies are probably involved in:
grandymaker [24]

Answer:

systemic lupus erythematosus

Explanation:

Systemic lupus erythematosus (SLE or just lupus) is a chronic inflammatory disease of autoimmune origin, the symptoms of which may appear in various organs slowly and progressively (in months) or more rapidly (in weeks) and vary with phases of activity and remission. Because it is a disease of the immune system, which is responsible for producing antibodies and organizing inflammation mechanisms in all organs, when a person has SLE they may have different types symptoms and various body locations. Some symptoms are general such as fever, weight loss, loss of appetite, weakness and discouragement. Others, specific to each organ such as joint pain, skin blemishes, pleural inflammation, hypertension, and / or kidney problems.

The main cause of this disease is the imbalance in the production of antibodies that react with proteins in the body itself and cause inflammation in various organs such as the skin, mucous membranes, pleura and lungs, joints, kidneys, etc.). Thus, we understand that the type of symptom a person develops depends on the type of autoantibody the person has, and that as the development of each antibody relates to the genetic characteristics of each person, each person with lupus tends to have clinical manifestations. specific and very personal (symptoms).

Autoantibodies are antibodies directed to the body's own cells and tissues. Normally, the immune system differentiates the body's own proteins from foreign proteins, forming antibodies only against those identified as potentially dangerous.

8 0
3 years ago
Which statements describe functions of antibodies? Select two options.
Evgen [1.6K]

Answer:

They protect the body from infectious agents.

And

They signal the immune system to destroy pathogens.

Explanation:

I HOPE THIS HELPS

6 0
3 years ago
How are scientists able to observe, record, study, and predict changes in the earth
Luba_88 [7]

ANSWER:

Its because mother nature tells us herself!

its just like predicting when rhinos will go instinct:

imagine people killing 2 rhinos a week or every two weeks and theres only 500-1000, you can predict that in prob 3-5 years they'll go instinct

so its just like that and they have much higher technology now that it'll just give them the answer without putting much effort into it.

~batmans wife dun dun dun....

5 0
3 years ago
An amoeba is a single-celled organism that feeds on algae, plants cells, bacteria. When an amoeba feeds, it first makes contacts
Svetach [21]

The answer is; endocytosis

This is a form of active transport that enable cells to import large particles that cannot pass across the membrane. It is a bulk transport system.  The opposite of endocytosis s exocytosis where the cell expels large particles to the outside of the cell.  


3 0
3 years ago
Read 2 more answers
Creative examples of biotic and abiotic factors quick!
Ivanshal [37]

Answer:

<u>Some overall examples of biotic and abiotic factors are listed below.</u>

<u>Biotic factors: predators, competitors for food, competitors for space, parasitism, disease, animals, plants.</u>

<u>Abiotic factors: sunlight, wind, soil, atmosphere, water, temperature, humidity, UV radiation, salinity, pH levels.</u>

4 0
3 years ago
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