Although the adaptive immune system has two arms, it has been said, 'no T cells, no immunity.' Explain.

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Welcome back. Let's look at our next question. It says which the following best describes the role of T lymphocytes in the adaptive immune system. A production of antibodies to neutralize pathogens. B, direct killing of infected cells and cancer cells cagey tosis of pathogens by engulfing them or d release of histamine to trigger an inflammatory response. While the T lymphocytes, their role is choice b direct killing of infected cells and cancer cells, they recognize specific antigens on the surface of these infected cells or cancer cells and then destroy them. The way I like to remember that is the tea is actually for a thymus as opposed to B for bone marrow. But when I think of the T lymphocytes, I think of T for toxic, they're toxic to the cells. And that's how I remember their role. Let's look at our other answer. Choices to understand why they're not correct choice. A production of antibodies to neutralize pathogens. That's the B cells that produce antibodies, not the T cells. Then to see phay tosis of pathogens by engulfing them. Uh and the immune system does do that, but it is not the T cells that primarily do that. It's the uh cells including macrophages, neutrophils and dendritic cells are all immune cells that do that but T cells are not among them. And then choice D release of histamine to trigger an inflammatory response. This would be mast cells, not T cells. So again, the best description of the role of T lymphocytes in the immune system. Choice B direct killing of infected cells and cancer cells. See you in the next video.

Although the adaptive immune system has two arms, it has been said, 'no T cells, no immunity.' Explain.

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Key Concepts

Adaptive Immune System

T Cells

Immunity