1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Semenov [28]
3 years ago
10

(Ch. 27.4) Many people are allergic to substances in the environment, such as ragweed pollen, as well as foods, such as peanuts.

Which of these statements BEST describes an allergic reaction to one of these substances? (1 point) A. The substance is similar or identical to human antigens, and so it triggers an immune system response. B. The substance invades the body and causes damage to tissues, which triggers an immune system response. C. The substance does not directly harm tissues and is not a pathogen, but nevertheless triggers an inflammatory response. D. The substance invades the body and triggers a response from the respiratory system or digestive system, but not the immune system.
Biology
1 answer:
djverab [1.8K]3 years ago
3 0

Answer:

C. The substance does not directly harm tissues and is not a pathogen, but nevertheless triggers an inflammatory response.

Explanation:

When a person is allergic to a substance, his or her immune system recognizes a harmless substance, such as components in food, pollen, or dust, as a treat. As a consequence, it starts an immune response that leads to inflammation. The substance that starts the allergic reaction is called an allergen, and it is not a pathogen because it is not a real threat to the body since it does not infect cells. When the allergen enters the body, it binds to antibodies that are in contact with a special type of cell. These specific cells will release a substance known as histamine. Histamine will produce an inflammatory reaction affecting different tissues in our body. For example, it can make us sneeze, have a running nose, swelling parts of our body, have itchiness and redness, amongst others.

You might be interested in
What's stock exchange? anyone bor ed and down to talk?
loris [4]

Explanation:

It is a place where shares of pubic listed companies are traded. ... A stock exchange facilitates stock brokers to trade company stocks and other securities. A stock may be bought or sold only if it is listed on an exchange.

3 0
3 years ago
Read 2 more answers
What are CD4+ cells?
telo118 [61]
The answer is <span>B.  immune cells that are destroyed by HIV 

CD4+ are immune cells (white blood cells) and are an important part of the immune system. Their name comes from the presence of CD4 glycoprotein on their surface. HIV uses CD4 glycoproteins on the surface of CD4+ cells to entry into the cells. The consequence is a reduced number of those cells. Therefore, CD4+ immune cells are destroyed by HIV.</span>
4 0
3 years ago
Which best describes alleles?
8090 [49]

Answer:

D. they are usually dominant or recessive.

Explanation:

alleles are pairs of genes found on a particular spot a chromosome. If one is dominant over the other it give rise to a particular trait.

3 0
2 years ago
Read 2 more answers
Julio blows air across his hot bowl of soup. The tiny ripples he creates are similar to
Bad White [126]
The answer would be Cyclones
8 0
3 years ago
Read 2 more answers
List 4 root causes of environmental problems.
Novay_Z [31]
<span>Accelerating degradation of transboundary ecosystems.
Over exploitation of valuable natural resources.
Soil degradation and increasing sedimentation.
<span>Pollution of water bodies.

   Just to name a few</span></span>
6 0
3 years ago
Other questions:
  • What happens to the force of gravity between two masses if one mass is decreased
    6·2 answers
  • What structures are found in every living cell
    10·2 answers
  • _____________________ are the first organisms to colonize an area and begin the process of ecological
    11·1 answer
  • A. True
    7·1 answer
  • Sweating and panting are examples of which characteristic of life? responding to the environment using energy reproducing growin
    14·1 answer
  • Is the trans pecos ecoregion of texas considered a desert ? true or false
    6·1 answer
  • A nurse is meeting with a woman scheduled to have a modified radical mastectomy to remove an aggressive breast tumor. The woman
    12·1 answer
  • Malaria was once prevalent in Europe and the USA in the early 1900s but was successful eliminated from these areas. However, mal
    8·1 answer
  • HELP PLEASE !!!!
    10·1 answer
  • Please help me asap i will give brainlest
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!