ATI TEAS Immune System Final Exam Guide 2024.

ATI TEAS Immune System Final Exam Guide 2024. immune system - ANSWER -protects our bodies from foreign pathogens, or infectious agents -comprised of the lymph nodes, thymus, bone marrow, and spleen -all immune cells are born in the bone marrow but can mature in different locations across the body first line of defense - ANSWER -physical barriers, such as the skin, which prevent most pathogens from accessing our bodies -when these barriers are breached, immune cells from the innate and adaptive arms target pathogens for destruction -skin has a acidic pH b/t 3 and 5, which discourages replication of most pathogens -skin is inhabited by flora pathogens - ANSWER foreign infectious agent innate arm - ANSWER -quick to respond, but not specific to individual pathogens nor does it form memory cells adaptive arm - ANSWER -slower to activate, but it specifically targets a pathogen and forms memory cells adaptive immunity (slow response) - ANSWER -B cell releases antibodies -T cell forms a CD4+ T cell and a CD8+ T cell -quick to respond but unable to form memory -this system consists of granulocytes, monocytes, and natural killer cells -slower to respond b/c it must first be activated by antigen presentation by cells of the innate immunity system -once activated, it will specifically target pathogens and host cells displaying the presented antigen -includes both T and B cells -normally self tolerant innate immunity (fast response) - ANSWER -involves macrophages and natural killer cell, lysozyme, interferons, and antimicrobial peptides -basophil -- eosinophil -- neutrophil -quick to respond but unable to form memory -this system consists of granulocytes, monocytes, and natural killer cells -DOES NOT include antibodies!