The first line of immune defense involves all the following EXCEPT B- and T-lymphocytes Physical barriers such as resident microbiota, flushing action of sweat Antimicrobial secretions from various locations in the body Nasal hair in the respiratory tract that traps particles and moves them upward and outward from the lungs
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This includes the skin, mucous membranes, and secretions like sweat and saliva which can flush away or kill pathogens. Resident microbiota, or the normal bacteria and other microorganisms that live on our skin and in our bodies, also play a role in this first line Show more…
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The physical barriers that are part of the immune system function by having a. mucus that traps pathogens and other foreign substances b. None of the answers are correct c. All of the answers are correct d. tightly packed epithelial cells that prevent pathogens from entering tissues e. cilia that sweep mucus out of the throat
Marlyn J.
The specific immune response is the second line of defense after anatomical and chemical barriers. It involves memory of antigens from previous exposure. it is the first line of defense in the immune system. It involves millions of B and T cells - each individual cell can recognize many different antigens. T cells arise and finish development in the bone marrow. all carry out the same function. are responsible for cell-mediated immunity. make antibodies. Antigens are universal molecules shared by many microbes. are only found inside or on the surface of microbes. are molecules that can be recognized by B- or T-cells. refers to any molecule found inside the body.
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Innate immune system defenses include which of the following? a. B cells b. T cells c. plasma cells d. phagocytosis
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