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Hunter-Best [27]
4 years ago
7

What role do all antigen-presenting cells (APCs) play?

Biology
1 answer:
lbvjy [14]4 years ago
4 0

Answer:

b). activation of T cells

Explanation:

An APC (antigen-presenting cell) can be described as an immune cell, which detects, uptakes, and informs the acquired immune response when an infection takes place. B cells, macrophages, and dendritic cells are antigen-presenting cells.

These cells play an important role in activation of T cells. T cells are unable to recognize soluble or free antigens and can only recognize antigens processed and presented by carrier molecules, such as MHC molecules.

Presence of MHCII molecules is a defining feature of APCs that process and present antigens to T cells. Hence, all antigen-presenting cells help in activation of T cells.  

Thus, the correct answer is option (b).

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Which system transports nutrients from the digestive system through out the body
lapo4ka [179]

Answer:

Circulatory system

Explanation:

The circulatory system is one of the eleven organ systems of the human body. Its main function is to transport nutrients to cells and wastes from cells

Primary purpose of circulatory system is to transport blood throughout the body by circulating

4 0
2 years ago
What causes a shooting star in the night sky
hammer [34]

Answer:

Meteors

Explanation:

When meteors burn up in the earth's atmosphere it lwaves behind a dust trail of the comet, thus making a shooting star

3 0
3 years ago
Read 2 more answers
Which location in the cell is unlikely to contain ribosomes and ribosomal subunits?
Zina [86]

The correct answer is Smooth Endoplasmic reticulum.  

Ribosomes are distinct from other organelles as they possess no membrane enveloping them, which differs from other organelles, they comprise of two subunits, and when they are generating some of the proteins they can turn membrane bound to the ER.  

The smooth endoplasmic reticulum does not possess ribosomes on its surface and thus does not take part in the formation of proteins. The SER has been found to take part in the synthesis of steroids.  


8 0
3 years ago
What type of volcano is found along a convergent boundary
ioda

Answer:

Composite volcanoes

5 0
4 years ago
You identify a new species of microorganism in an undersea thermal vent. The microbe is a single cell organism that lacks a nucl
Alenkinab [10]

The domain of the new species of unicellular microorganism in an undersea thermal vent that lacks a nucleus is Archeae.

<h3>What is domain?</h3>

Domain in biology refers to the highest rank in the classification of organisms, above kingdom.

The three domain of organisms are as follows:

  • Prokarya or Bacteria
  • Archaea
  • Eukarya

Members of Prokarya and Archaea do not possess a membrane-bound nucleus, however, the major difference between them is that members of domain Archaea are found in extreme habitats e.g. hot regions.

Therefore, the domain of the new species of unicellular microorganism in an undersea thermal vent that lacks a nucleus is Archeae.

Learn more about domain at: brainly.com/question/13113489

#SPJ2

6 0
2 years ago
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