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3 years ago

Explain the process by which an attack of hay fever follows exposure to pollen

1 answer:

4 0

Hay fever is a manifestation of allergic reaction from pollen, which is prevalent during haying season. Hay fever is commonly known as allergic rhinitis caused by an oversensitive immune system, particularly the lymphocytes, leading to a misdirected immune response. The body undergo a sensitization when one develops IgE antibodies and develop a strong TH2 response against pollen. Then, this newly develop IgE antibodies sticks to basophils and mast cells with no signs and symptoms yet. However, when one is expose again to pollens, mast cells will be activated and release mediators who are responsible for immediate vascular and smooth muscle reaction. After this, local clinical manifestation of hay fever will be observed.

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At what time of the year are most of the animals living in a temperate forest likely to reproduce?

Pepsi [2]

Answer:

I would have to say spring and summer because during winter animals hibernate because food is low and so is the temperature and in the fall plants are dying to prepare for winter. If you can't pick both summer and spring I'd go with spring.

8 0

3 years ago

Describe the sources, types, and effects of varying pollutants

Zinaida [17]

Pollutants can be stated as the substance which affects the environment and it causes lots of not wanted effects.

Explanation:

Types of pollutants:

1.Air pollution

2. Water pollution

3. Soil pollution

Sources of Air pollution:

Sources of Air pollution are listed below pollution causing substances from vehicles.
Then the polluting substances from power plants and industries
Then emission of wood and stuff

Effects of Air pollution:

The effects of air pollution include can lead to respiratory problems.

Sources of water pollution:

The sources of water pollution include radioactive substances, disposal from sewage waste disposal from industries and factories.

Effects of water pollution:

The effects of water pollution include it kills the living organisms in water bodies and it contaminates the water bodies

Sources of land pollution:

The source of land pollution comes from the contamination and waste disposal of human wastes, then the mining activities will lead to the contamination of land pollution and nuclear waste

Effects of land pollution:

The contamination of land pollution causes an increase in Landfill, soil pollution and it will lead to human health disorder and sometimes it will lead to endangered species of animals

5 0

3 years ago

As air moves from the base up the side of a mountain, it cools. What is one consequence of this movement of air?

katen-ka-za [31]

Moisture will drop as rain as the air moves up the side of the mountain.

Hope this helps!

8 0

3 years ago

Which method is often used in the disposal of medical waste

RideAnS [48]

Usually if we are talking about needles and body fluids, They are usually put into a box that is labeled hazard! And they dispose of the materials in a special trash can! :) Hope this helps!

7 0

3 years ago

Read 2 more answers

Which of the following represents molecular genetics?

Angelina_Jolie [31]

Answer:

I think the correct answer is of letter A.

8 0

3 years ago