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Deffense [45]
3 years ago
7

Question 1(Multiple Choice Worth 2 points)(05.05 MC)How does the human immune system initially respond to a pathogen?

Biology
1 answer:
Rufina [12.5K]3 years ago
4 0

Immediately, the pathogen has been recognized:

Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.

The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.

Antibodies helps to immobilize pathogen for macrophage to feed on.

if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.

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If all living organisms contain the same DNA how is it that we are all different?
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Genes are made up of DNA.. DNA is the molecule that is the hereditary material in all living cells. The color of your hair,skin,eyes etc,, are all controlled in part by your genetic information

Explanation:

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How do vaccines help to possibly protect you from the symptoms of a virus?
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Atoms with high ionization energy allow their electrons to easily be taken
nlexa [21]

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FALSE

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3 years ago
Cyanide, raw sewage, petroleum from shipping accidents, and detergents are all examples of?
topjm [15]

Cyanide, raw sewage, petroleum from shipping accidents, and detergents are all examples of Water pollution.

Water pollution is the contamination of water bodies by substances like Cyanide, raw sewage, petroleum from shipping accidents, and detergents This makes water unfit for drinking, cooking, cleaning, and other purposes. It may provide an environment suitable for growth of bacteria, algae bloom and other parasites which even destroys the life of animals residing in the water body like fishes.

All other forms of pollution eventually make their way to water and disturb the pH of water. Biochemical Oxygen demand (BOD) is the attribute which measures the pollution in water body at surface level.

Hence,Cyanide, raw sewage, petroleum from shipping accidents, and detergents are all examples of Water pollution.

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brainly.com/question/19920929

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