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Kitty [74]
3 years ago
8

How does using killed or weakened bacteria in an immunization help the body prevent infections?

Biology
1 answer:
Ray Of Light [21]3 years ago
4 0
The answer is A.) Antibodies are formed that fight those types of bacteria.

To explain, your immune system protects you from invasive bacteria by attacking and destroying them. The problem is that your system needs to recognize invading organisms like bacteria. Remember that bacteria cells have many of the same types of structures as your own cells, and you do not want your immune system to attack your own body. Special cells called T-cells and B-cells participate in this process. To make a long story short, antibodies are special molecules that your immune system "labels" invading bacteria with, so that it knows what to attack. These antibodies only fit on molecular structures of the targeted bacteria.

When a dead or weakened bacteria, or even pieces of a bad bacteria are introduced to the body, the B-cells and T-cells create antibodies that label that specific type of bacteria, or even its parts. They also remember how to make them in the future, so that later, when and if infected with a live version of that bacteria, the immune system already makes the antibodies to fight that infection. The process can work for viruses too.
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- 4x + 5y = - 36<br>15x – 3y = 32​
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Answer:

x=6/7, y=-228/35

Explanation:

-4x+5y = -36 /*3

15x-3y = 32  /*5

------------------------- here we multiply both equations to get common y

-12x+15y = -108

75x-15y = 160

------------------------- then we add these two equations to eliminate the y

-12x+75x+15y-15y = 54

63x = 54

------------------------- then we get the x

x = 54/63

x = 6/7 (after we divide both with 9)

------------------------ next up, we add the value of x in first equation

-4 * 6/7 + 5y = -36

-24/7 + 5y = -36

------------------------ we leave 5y on the left side

5y = -36 + 24/7

5y = -252/7 + 24/7

-------------------------- common divider is 7 so we multiply 36*7=252

5y = -228/7

y= -228/7/5/1

------------------------- now we leave only y on the left side

y = -228*1/7*5

y = -228/35

------------------------- when dividing the fragment we multiply outer and inner

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