What is the sequence of defense for fighting off pathogens

2 answers:

8 0

When a pathogen comes in contact with your body, it has to breach the first line of defense to get inside. Your skin and mucus membranes are the main barrier here. Mucus traps the pathogens, and then is forced out of your body when you cough or blow your nose. Your skin also secretes chemicals that have antiviral properties, killing viruses on contact. If the pathogens get through that defense, the next line is non-specific immunity cells that patrol your tissues engulfing pathogens. There are other cells that do this, like macrophages, but the dendritic cells are most important for activating the third line of defense in your body.

Dendritic cells reside in your tissues, waiting for an invader to arrive. When they do find one, they engulf it and digest it. After they do this, they select pieces of the invader called antigens and put them on their surfaces. The dendritic cells migrate back to lymph nodes, key locations in your body filled with immune cells. There, they show the antigens, called antigen presentation, to two types of lymphocytes, T-cells and B-cells, activating them for a full immune response.

dimaraw [331]3 years ago

6 0

A. Tears --> Fever --> Antibodies

Explanation: Google-I mean I know best for yall hehe....I searched it up on google. Oop.

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Select all that apply. Which of the following components of air help to trap infrared energy? nitrogen oxygen carbon dioxide wat

IRINA_888 [86]

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Explanation:

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Naddika [18.5K]

Answer:

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3 years ago

Why are open circulatory systems advantageous to some animals?

goldenfox [79]

Answer:

Open circulatory systems are advantageous to some animals because they use less metabolic energy.

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So that it can be understood more easily, it is necessary to think about this system acting in organisms much smaller and less complex than mammals or any other vertebrate of greater size. As this animals doesn't have a great size, they need to use less metabolic energy than more developed organisms, so this system allows them to save metabolic energy to be used in other living functions.

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39 points

Anna71 [15]

u are lying u are not giving 39 points u are just giving 5

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