OVERVIEW OF THE IMMUNE SYSTEM
IMMUNITY INNATE AND ADAPTIVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Skin forms a physical and antiseptic barrier to pathogens
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Leukocytes detect the antigens of the E.coli bacterium and produce antibodies
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Macrophages engulf bacterial cells at the site of infection
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The body produces large numbers of memory cells with specific antibodies
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Detailed explanation-1: -Nonspecific defenses include anatomic barriers, inhibitors, phagocytosis, fever, inflammation, and IFN.
Detailed explanation-2: -The innate leukocytes include: natural killer cells, mast cells, eosinophils, basophils; and the phagocytic cells include macrophages, neutrophils, and dendritic cells, and function within the immune system by identifying and eliminating pathogens that might cause infection.
Detailed explanation-3: -Macrophages work as innate immune cells through phagocytosis and sterilization of foreign substances such as bacteria, and play a central role in defending the host from infection.
Detailed explanation-4: -Answer and Explanation: Of the following cells, the neutrophils (answer choice D) are the cells involved in nonspecific or innate immunity. The remaining cell types are all involved in the adaptive or specific immunity.
Detailed explanation-5: -Physical barriers, like skin and mucous membranes. Chemical deterrents, like antimicrobial enzymes in bodily fluids and stomach acid. Reflexes, like coughing and sneezing. Cells, like macrophages, basophils, and natural killer T-cells. 02-Feb-2022