Complete this concept map to summarize the key concepts concernin...

Question

Complete this concept map to summarize the key concepts concerning the body's defenses.

Accepted Answer

Welcome back. Here's our next question. It says which of the following is not an attribute of the immune system. So let's look through our choices, remembering that we're looking for something that's not part of the immune system. So Choice A says it has the ability to detect and combat infection. Well this is obviously sort of the main function of the immune system. So not our answer here, Choice B says it has the ability to recognize host cells as non self molecules. Well this is a false statement. Host cells would be the self so it's not going to recognize host cells as non self molecules. Um it would recognize host cells as self molecules. So that is going to be our answer here as not being an attribute of immune system. Since that's a false statement there it's very important that the immune system has to be able to recognize its own molecules so as not to attack its own cells. Obviously that goes awry in the case of autoimmune disorders but normally it distinguishes its own cells. Choice C says it remains a memory of previous foreign infections and yes this is of course a key aspect of our immune system. It keeps around memory B and T cells so that if a pathogen is encountered again the body can quickly rev up an immune response. So Choice C. Is not our answer. And finally, Choice D. Says it has the ability to limit the response once the pathogen has been eliminated and this is also an after repeated the immune system um through regulatory T cells also somebody's known as suppressor T cells, which down regulate the induction and proliferation of effect, or T cells when the pathogen has been eliminated. So that turns off the response when things are normal, preventing the immune system from going and starting to attack itself. So, Choice D. Is also a characteristic of the immune system and therefore not our answer. So which of the following is not an attribute of immune system. Choice be it has the ability to recognize host cells as non self molecules. See you in the next video.

Complete this concept map to summarize the key concepts concerning the body's defenses.

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