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bixtya [17]
3 years ago
14

Helppppppppppp i don’t knowwwww

Biology
1 answer:
devlian [24]3 years ago
8 0
The answer you pick is right hopefully this helped
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(Ch. 27.4) Many people are allergic to substances in the environment, such as ragweed pollen, as well as foods, such as peanuts.
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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.

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 A scientific question is a question that is based on observations and that is testableThe scientist asks a new question about the impact of climate change on the species because the results of the investigation led to new scientific questions. Correct answer: C

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Which of these polymers acts like as an energy storage molecule
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3 years ago
What receives blood from the head
Ahat [919]

Answer:

Right Atrium

Explanation:

ion really know but sounds like a

Right Atrium/Heart typo answer

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