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Sonbull [250]
3 years ago
9

A young adult is exposed to a virus that infects and replicates in mucosal epithelial cells of the upper respiratory tract. One

component of the protective immune response to this viral infection is mediated by CD8 cytolytic T lymphocytes (CTLs), which recognize and kill virus-infected cells. The CTLs can recognize and kill the infected cells because ______
Biology
1 answer:
marishachu [46]3 years ago
3 0

Answer:

The CTL has specific receptors that can recognize infected or damaged cells.

Explanation:

The cytotoxic T cells (CTL) is a type of white blood cells that specifically helps in destroying virus-infected cells (also damaged cells and cancer cells).

This type of cells has a special receptor called T-cells receptors (TCR) which ones recognize specific antigens (molecule that stimulate the immune systems because are “strange” to them). Virus inside a cell could bind to a special molecule called class I MHC, this molecule moves the virus to the surface of the cell where it can be recognized by a CD8+ specific antigen-receptor of the CTL.

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A ______ plane passes through the breast, hip, and knee on only one side of the body.
stepladder [879]

A parasagittal plane passes through the breast, hip, and knee on only one side of the body.

Not including the median plane passing through the midline, the  parasagittal plane is situated alongside or parallel to the sagittal plane. Because <span>viewing is achieved along the sagittal axis, such a section is often referred to simply as a "sagittal" view.</span>

6 0
3 years ago
In C3 plants the conservation of water promotes_______.a. photorespiration. b. a shift to C4.c. photosynthesis.d. the opening of
ankoles [38]

Answer:

A) photorespiration.

Explanation:

Photorespiration is the harmful metabolic process which takes place when the concentration of oxygen in the leaf increases compared to carbon dioxide.

The RUBISCO enzyme which usually binds the carbon dioxide now binds the oxygen and form the phosphoglycolate and 3 phosphoglycerate. The phosphoglycolate is lost through the Calvin cycle as Carbon dioxide molecule. This loss proves harmful to the plants.

The photorespiration occurs when the plant faces high temperature therefore n order to prevent water loss the stomata gets closed. This result in the binding of the oxygen to the RUBISCO and thus photorespiration begins.

Thus, Option-A is correct.

6 0
2 years ago
Question 4: Suppose there were changes in the habitat that caused this actual value. What might a combination of those changes b
guapka [62]

Your question is really vague, but when I typed it in, I found this website with people answering the same question: https://studyandanswers.com/biology/question20660094

3 0
3 years ago
Analyze DNA is isolated from a hair found in a knit hat that was recovered from the scene of a bank robbery. DNA fingerprints ar
zepelin [54]

The DNA of the samples is isolated, and then the mapping is carried out, which is done by equipment called "DNA Sequencers". With this, it is possible to compare the genomes and conclude to whom the hair belongs.

<h3>DNA in the hair?</h3>

In the case of hair, researchers can rely on these two types of DNA (nuclear and mitochondrial). However, according to the Easy-DNA Laboratory, a hair that is cut, unfortunately, does not contain any valid DNA nucleus. However, when the hair still contains the hair bulb (hair root) it is possible to extract the nuclear DNA, because in that region we have thousands of hair forming cells (keratinocytes).

With this information, we can conclude that the DNA can be analyzed and compared, arriving at who committed the bank robbery.

Learn more about DNA in brainly.com/question/264225

4 0
2 years ago
Geologic time is divided into units based upon types of__?
amm1812

Geologic time is divided into units based upon types fossils found in each area .


I hope that's help !

5 0
3 years ago
Read 2 more answers
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