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serg [7]
3 years ago
7

Which of the following are protective barriers that are part of the body's immune system​

Biology
1 answer:
Dmitry [639]3 years ago
3 0
The skin, mucous membranes, and endothelia throughout the body serve as physical barriers that prevent microbes from reaching potential sites of infection. Tight cell junctions in these tissues prevent microbes from passing through.
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ATP gives free energy that the cell can use for energy using processes in the cell

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Biologist study life to the extent to which they can uncover, unearth and investigate unseen, latent and concealed life forms that are still many in number, these crawling and under the water creatures. And in experimental sense, many biologists are guided by the ethics in researching life forms. This is to protect and inhibit other biologist in killing thousands of these living organisms and prevent them from becoming extinct. Remember that biologists or any other scientists study because of knowledge and to contribute to the scientific world of making the ecosystem including us into a much better and cultured place and not the opposite.

Hence, there are non-experimental and experimental approaches which are all subject to ethics. In exploring life forms, it is quite unlimited but studying life forms in experimental sense, it is somehow depends on the number of species that the biologists’ study.



6 0
3 years ago
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svp [43]

Answer:

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All donated blood is tested for syphilis, hepatitis, and hiv according to guidelines established by the food and drug administra
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