12 Questions
What is the primary purpose of the immune system?
To maintain a balance between self and non-self
Which of the following is NOT a characteristic of the nonspecific immune response?
Exhibits immunological memory and responds more strongly over time
What is the primary function of the skin in the nonspecific immune response?
To form a mechanical barrier against microbial invasion
Which layer of the skin is responsible for producing keratin?
The epidermis
What is the significance of the term 'nonspecific' in the context of the innate immune response?
It means the response is not directed against a specific pathogen
How does the nonspecific immune response differ from the adaptive immune response?
The nonspecific response is the same each time, while the adaptive response becomes stronger
What is the main function of the skin's slightly acidic pH?
To provide a protective barrier against microorganisms
What is the primary role of the mucous membranes in the body's defense against microbial invasion?
They provide a physical barrier that traps and prevents the penetration of microorganisms
What is the primary mechanism by which the respiratory system defends against microbial invasion?
The air-filtration system of the upper and lower respiratory tracts traps and removes most inhaled microorganisms
What is the primary mechanism by which the gastrointestinal tract defends against microbial invasion?
The acidic gastric juice (pH 2-3) kills most microorganisms and their toxins
What is the primary function of the tears (lacrimal fluid) in the eye's defense against microbial invasion?
The continuous flushing action of tears physically removes microorganisms from the eye
What is the primary role of lysozyme, lactoferrin, and sIgA in the eye's defense against microbial invasion?
They have antimicrobial properties that directly kill or inhibit the growth of microorganisms
Learn about the general ability of the host to resist infections, the science of immune responses, the distinction between 'self' and 'nonself', and the different types of immune responses to foreign challenges.
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