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Effectus [21]
1 year ago
15

Explain how the human immune system responds to a viral infection.

Biology
1 answer:
nikdorinn [45]1 year ago
8 0
Infected cells create and release small proteins known as interferons, which help the immune system fight viruses. Interferons stop viruses from replicating by interfering with their ability to multiply within infected cells.
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frebel, h., richter, k. and oxenius, a., how chronic viral infections impact on antigen-specific t-cell responses. eur. j. immun
jekas [21]

The ability of a cell or a body to fight against the infection is called immunity. The T cell and B cell helps the body to fight against the infection.

<h3>What are T cells?</h3>

T cell is also called as T lymphocyte, it is also a important part of immune system. T cell originate in the bone marrow and mature into the thymus.

There are three types of T cells:

  • T helper cell
  • T killer cells
  • T cytotoxic cells.

Helper T cells secrete chemical messengers called cytokines. Regulatory T cells helps to control immune reactions. They are released into blood streams.

Therefore, The ability of a cell or a body to fight against the infection is called immunity. The T cell and B cell helps the body to fight against the infection.

To learn more about T cells, refer to the link:

brainly.com/question/1434048

#SJ2

6 0
2 years ago
The zika virus was first identified in Uganda in 1947. The virus is transmitted from person to person by a bite from a mosquito.
UNO [17]

Answer:

1. It is a highly contagious disease transmitted from person to person and thereby it is expected that infected persons carried the virus to America  

2. Microcephaly is a serious birth defect where a baby’s head is much smaller than expected.

3. Occipital bone. CNS malformations: ventriculomegaly, parenchymal and periventricular calcifications and cortical migration anomalies

Explanation:

The Zika virus (Flaviviridae) causes a contagious disease and it is transmitted by Aedes mosquitoes, which are also the main vectors of the dengue virus. Microcephaly is a condition where the baby’s brain has not developed properly during pregnancy, and it has been shown that this birth defect is associated with the Zika virus. During 2015 in Brazil, the incidence of infants with microcephaly born from mothers that contracted this disease during pregnancy was higher, thereby suggesting an association between both conditions. Baby health problems associated with Zika infection include microcephaly (skull partially collapsed), joints with limited motion, etc.

8 0
3 years ago
The endoplasmic reticulum and Golgi apparatus are both membrane-bound organelles found in eukaryotic cells. Which statement desc
snow_lady [41]

<span><span>The ER assembles proteins, and the golgi body modifies and packages them.


</span>ER Golgi apparatus, because it packages proteins received from the ER cytoplasm </span>

<span>The Golgi body are the ones that slightly alter, organize and prepare so-called parcels to be delivered for all the organelles in the cell. They receive these packages mainly in the rough endoplasmic reticulum. These packages that set out by Golgi body are macromolecules that used and synthesized by cells in many operations. If ER is absent then it would only mean that Golgi body would have no use other than simply lysosomes but these macromolecules plays a dynamic role in many organelles –nutrients, ATP and cell metabolism. It'll have a ripple effect if ER is absent in the cell.<span>
</span></span>

4 0
3 years ago
State two functions of a microscope​
sattari [20]

Answer:

what is microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye.

FUNCTIONS : The microscope is one of the most important tools used in chemistry and biology. This instrument allows a scientist or doctor to magnify an object to look at it in detail. Many types of microscopes exist, allowing different levels of magnification and producing different types of images

3 0
2 years ago
Please help me on this thank you
Anit [1.1K]
Synthesis, as a good way to see synthesis would A + B = AB 
3 0
3 years ago
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