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3 years ago

What type of immunity exists even in the absence of a stimulus?

Biology

1 answer:

Evgen [1.6K]3 years ago

5 0

Answer:

The correct answer is: adaptive immunity.

Explanation:

Adaptive immunity (also called acquired immunity) is one of the two parts of the immune system.

Unlike the innate immunity that responds to any pathogens, the adaptive immunity is highly specific and provides long-lasting protection because once the cells from adaptive immunity contact the antigen (any molecule that triggers an immune response) they become ready to fight them again later in life with a much more efficient approach - this is what is known as immunological memory and is the reason vaccines work.

Acquired immunity does not need a stimulus to exist, unlike innate immunity (the later only acts when there are pathogens involved).

The acquired immune system is mostly integrated by lymphocytes.

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kogti [31]

Answer:

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Explanation:

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Nitrogen is to the immediate left of oxygen in the same row in the periodic table. Which of the following statements compares th

Tanya [424]

Answer:

<em>The correct option is 'Nitrogen has a larger radius and one less proton than oxygen.'</em>

Explanation:

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The atomic number of oxygen is 8 which means oxygen has 8 protons in its atom. Hence, oxygen has one more proton than a nitrogen atom.

The radius of an atom decreases when moving from left to right in the periodic table. Hence, the radius of nitrogen will be larges as compared with oxygen.

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4 years ago