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rosijanka [135]
3 years ago
11

Age-associated changes in the immune system, also known as _______________________, are thought to be responsible for the increa

se in infections and cancer as adults age.
Biology
1 answer:
wariber [46]3 years ago
5 0

Answer:

The correct answer is: Immunosenescence.

Explanation:

  • Immunosenescence can be defined as a biological age-related phenomenon due to which the cells of the immune system are unable to function efficiently with increase in age.
  • As a result of this the aged individuals becomes susceptible to various infections and diseases.
  • This happens because of the following reasons:
  1. The immune cells are formed from the progenitor cells called the Hematopoetic Stem Cells (HSCs) which are abundantly found in the bone marrow. These cells have the capacity of self-renewal and also differentiation into various types of immune cells. Due to aging, these cells accumulate large number of Reactive Oxygen Species (ROS) that that causes oxidative damage to the DNA. Also, with age the telomere (the repititive DNA sequence located at the chromosome terminal that protects the end of the chromosome from undergoing recombination or fusion with other chromosomes) length shortens resulting in the generation of damage in DNA. All these reduces the self renewal and differentiation capacity of these cells.
  2. Other cells of the immune system like, the white blood cells, anti-body producing B-cells, cytotoxicity inducing T-cells, natural killer cells also accumulate similar DNA degrading components. This reduces their life time and also the efficiency of their activity.
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(word bank)
choli [55]

Answer:

Sulfur; nitrogen.

Explanation:

Acid precipitation results when sulfur and nitrogen compounds react with water in the atmosphere.

This acid precipitation is also known as acid rain and it is typically caused by the chemical reaction between sulfur oxide and nitrogen oxide which are released into the air as a result of burning fossil fuels, with water and other chemical elements present in the atmosphere.

Generally, acid precipitation (acid rain) usually have a pH of about 5.1 or below and as such, it is very acidic nature i.e possessing a large amount of hydrogen ions.

Hence, acid precipitation (acid rain) when washed to the earth has negative or harmful effects on various living and non-living organisms such as animals, plants, cars, buildings etc.

5 0
2 years ago
Which one would this be?
klasskru [66]

Answer:

B

Explanation:

Proteins are made up of smaller building blocks called amino acid.

8 0
3 years ago
What are the chances a<br> heterozygote passes on<br> either a dominant or<br> recessive allele?
melisa1 [442]

Answer:

A parent with one copy of a dominant allele and one recessive coded Ww for the widow's peak  is called heterozygous for a trait and has a 50 percent chance of passing on the dominant allele to each of his or her offspring, regardless of the gene inherited from the other parent.

Explanation:

hope this helps in some way sorry if it does not

5 0
3 years ago
What type of protein stays only on the surface of the plasma membrane
nevsk [136]

Your answer is the peripheral proteins. Its on the inner or outer surface of the phospholipid bilayer, but not embedded in its hydrophobic core.

4 0
3 years ago
Read 2 more answers
Pls answer as many questions of the remaining numbers as you know of the water cycle. Please help I forgot
Oksi-84 [34.3K]

Answer:

Explanation:

4. Hot water

5. Steam

6. Cold air

7. a dew type thing

those are the only ones i know. I hope this helps you!!

5 0
3 years ago
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