MICROANATOMY

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BLOOD CARDIOVASCULAR SYSTEM LYMPHOID ORGANS

LYMPH NODES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
____ combine chemically with substances that the body recognizes as alien, such as bacteria, viruses, and foreign substances in the blood. A blood protein produced in response to and counteracting a specific antigen
A
Antibodies
B
Antigens
C
Pathogens
D
Posibodies
Explanation: 

Detailed explanation-1: -Antibodies are compounds of protein and sugar that circulate in the bloodstream. They are created by the immune system to fight germs and foreign substances. Antibodies can quickly detect germs and other potentially harmful substances, and then attach to them.

Detailed explanation-2: -Antibodies are proteins made by the body’s natural defence system (immune system) to fight foreign substances, such as bacteria. Antibodies attach themselves to the foreign substance, allowing other immune system cells to attack and destroy the substance.

Detailed explanation-3: -An antigen is any substance that causes your immune system to produce antibodies against it. This means your immune system does not recognize the substance, and is trying to fight it off. An antigen may be a substance from the environment, such as chemicals, bacteria, viruses, or pollen.

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