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3 years ago

When the immune system detects a pathogen in the body, it

Biology

2 answers:

anastassius [24]3 years ago

5 0

Poopgggggggggggggggggggg

Vlad [161]3 years ago

3 0

When a pathogen enters the body, cells in the blood and lymph detect the specific pathogen-associated molecular patterns (PAMPs) on the pathogen's surface. The immune system can be activated by a lot of different things that the body doesn't recognize as its own. These are called antigens. Examples of antigens include the proteins on the surfaces of bacteria, fungi and viruses. ... Sometimes the immune system mistakenly thinks that the body's own cells are foreign cells. Antigens are proteins that are found on the surface of the pathogen. ... The antibodies destroy the antigen (pathogen) which is then engulfed and digested by macrophages. White blood cells can also produce chemicals called antitoxins which destroy the toxins (poisons) some bacteria produce when they have invaded the body.

hope this helps :))

-ari.

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skad [1K]

Answer:

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Explanation:

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4 years ago

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How would clearing up pollution help address climate change?

xxTIMURxx [149]

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3 years ago

How many grams of the compound in the figure above are required to make 1 liter of a 0.5 M solution? (Note: The atomic masses, i

Dafna1 [17]

Answer:

This question is incomplete as there is no figure in the question but the compound in the figure is Ethanoic acid (CH3COOH). Hence, we can calculate the mass.

The answer is: 30grams

Explanation:

According to the question, the volume of the compound (CH3COOH) is 1litre while the molar concentration is 0.5M

Molarity or Molar concentration is calculated using the formula:

M= n/V

Where; M= Molarity (M) = 0.5M

n= number of moles (mol)

V= Volume (V) = 1L

Hence, number of moles (n) = M × V

n = 0.5 × 1

n = 0.5 moles.

To calculate the mass in grams of CH3COOH, we say;

Number of moles (n) × molar mass (MM)

Since atomic mass for (C= 12, H= 1 and O=16)

Molar mass of CH3COOH:

= 12 + 1(3) + 12 + 16 + 16 + 1

Molar mass of CH3COOH = 60g/mol

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Mass = 30grams.

Therefore, 30grams of CH3COOH compound are required to make 1 liter of a 0.5 M solution.

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3 years ago

In a certain breed of dogs, black hair is dominant and brown hair is recessive. If two parents are heterozygous for black hair,

Bezzdna [24]

There is a 3/4 chance their offspring will be black. If you make a Punnett's (I hope that's how you spell it) square then you will find that one offspring will be homozygous for black hair, two will be heterozygous with black hair, and one will be homozygous with brown hair. Therefore, there's a 3/4 chance the offspring will have black hair. Hope this helped!

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4 years ago

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4) Biotechnology has helped produce crops that are resistant to certain pests, crops that produce high yields, and more nitrogen

Kryger [21]

Answer: Option a

Explanation:

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There are few disadvantages one of them is beneficial insects are also adversely affected. There are many useful insects that helps in pollination and they are also killed because of pest resistant plant.

hence the correct answer is option A

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3 years ago