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loris [4]
4 years ago
14

A 14-year-old boy has been diagnosed with infectious mononucleosis. Which of the following pathophysiologic phenomenon is most r

esponsible for his symptoms?
A) The Epstein-Barr virus (EBV) is lysing many of the boy's neutrophils.
B) Viruses are killing some of his B cells and becoming incorporated into the genomes of others.
C) The EBV inhibits the maturation of white cells within his peripheral lymph nodes.
D) The virus responsible for mononucleosis inhibits the maturation of myeloblasts into promyelocytes.
Biology
1 answer:
Sunny_sXe [5.5K]4 years ago
8 0

Answer:

B) Viruses are killing some of his B cells and becoming incorporated into the genomes of others.

Explanation:

Epstein-Barr virus causes infectious mononucleosis by following mechanism.

1) Epstein-Barr virus attaches to and infects epithelium of the throat where it replicates and causes pharyngitis.

2) Virions enter the lymphoid vessels and are carried to the lymph nodes. Some virions escape the lymphnode trap and are carried to the bloodstream.

3) Virions attach specifically to B lymphocytes and infect them, producing either latent infection or productive infection.

4)The infected B lymphocytes actively replicate and differentiate into cells producing random immunoglobulins.

5)T cells respond to infection and destroy the lymphocytes replicating EBV vitus.

6) Latently infected B lymphocytes become immortal. They are not attacked by T cells.

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Answer:

a. the result of an individual's genetic constitution

Explanation:

Phenotype is the morphological expression of genotype. The genetic constituent of an individual is known as genotype. Genotype determines the genetic traits and imparts specific features of the organisms which constitute the phenotype of the organism.

The phenotype of the organisms depends on the type of the alleles of the genes present in the genome of the organisms.

For example, a human with genotype "ii" has blood type "O". Here, "ii" is the genotype that is responsible for phenotype "O blood type".

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A pea plant has one recessive allele for white flowers and one dominant allele for purple flowers. What flower color will the pe
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Explanation:

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How do nutrients get to the cells in a flatworms solid acoelomate body?
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3 years ago
Bacteria that can be found nealy every were
Sunny_sXe [5.5K]
That is true.

Hoped I helped!
4 0
3 years ago
A marine ecologist counts the number of crabs in three different intertidal regions that are each two hectares. The crab counts
romanna [79]

Answer:

Density is nearly 3 cabs per hectare

Explanation:

Given -

There are three three intertidal regions.

Area of each intertidal region is 2 hectares.

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Intertidal region I - 7

Intertidal region I - 2

Intertidal region I - 6

Sum of crabs in all three regions is equal to

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Now density per hectare is equal to total population of crab divided by total area of all the three intertidal regions

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