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klemol [59]
3 years ago
9

How does the immune system function?

Biology
1 answer:
professor190 [17]3 years ago
3 0

Answer:

Immune system of the body helps in fighting with the infectious agents that are foreign for the body. So the immune system protects us from infection.

When any foreign substance(antigen) comes in the body B-lymphocyte recognize it by binding the antigen through its receptor. After recognizing the antigen, B cell divides into antibody-producing plasma cell and memory cell.

Antibodies produced by plasma cells help in destroying the antigen by getting the antigen recognized by phagocytic cells or by complement activation.

B cells are antigen-presenting cell which present antigen to T cell and then T cell activates and produce chemicals that kill the antigen. Therefore the immune system has many immune cells that activate when an antigen comes in the body. This is how the immune system functions.

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If the earth were not tilted would there be seasons explain? Pls help
krek1111 [17]

Answer:

No

Explanation:

If the earth was tilted, there would be small changes in temperature, but there will be no seasons. The Earth's axis is now inclined at around 24 degrees. This is the main reason for the changing of the seasons. The Northern Hemisphere is in the warm season when the Earth is slanted toward the sun, and the Northern Hemisphere is in the cold season when the Earth is slanted away from the sun. The cycle repeats itself every year because the Earth rotates around the sun at a known and generally constant rate. The sun is higher in the sky during the warm season, making it warmer, and lower in the sky during the cool season, making it colder.

Hope this helps :)

-jp524

5 0
3 years ago
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The main source of cell energy is called ATP?
Schach [20]
This statement is true if that is the question
7 0
3 years ago
Identify the phases of Meiosis II described below. Chromosomes are lined up by spindle fibers. Nuclear envelope forms around eac
noname [10]

Answer:

1. Metaphase II - Chromosomes are lined up by spindle fibers.

2. Telophase II - Nuclear envelope forms around each set of DNA.

3. Anaphase II - Sister chromatids are pulled apart.

4.  Prophase II - Centromeres move toward the poles of the cell

Explanation:

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3 years ago
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Autotrophs make this biomolecule in the process of photosynthesis.
arlik [135]

Answer:

the answer is carbohydrate

4 0
2 years ago
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Predation is when a predator feeds on another organism, which is referred to as the predator's prey.
Alecsey [184]

Answer:

True

Explanation:

Predation is another mechanism in which species interact with each other. Predation is when a predator organism feeds on another living organism or organisms, known as prey. The predator always lowers the prey's fitness. Also, a predator is an organism that eats another organism. The prey is the organism which the predator eats. Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.

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