Which of the following is not part of your innate immune system? a) Skin b) Mucous membranes c) Antibodies d) Inflammation
c) Antibodies
Why are smokers more likely to have infections with respiratory pathogens?
Smoking damages the respiratory tract's mucous membranes and cilia, impairing the body's ability to clear pathogens.
Which are the most common portals of entry used by pathogens to enter the host? a) Skin b) Respiratory tract c) Digestive tract d) Urinary tract
b) Respiratory tract
What is included in the body’s nonspecific defense against invading pathogens?
Nonspecific defenses include barriers like skin and mucous membranes, as well as responses like inflammation and phagocytosis.
Which allergic condition is potentially life-threatening? a) Hay fever b) Eczema c) Anaphylaxis d) Asthma
c) Anaphylaxis
Which of the following is not a component of the second line of defense? a) Phagocytes b) Inflammation c) Skin d) Fever
c) Skin
What do the body's defense mechanisms protect us from?
The body's defense mechanisms protect us from pathogens and infections.
Antibody-dependent cell-mediated cytotoxicity would be used to destroy which of the following? a) Bacteria b) Viruses c) Parasites d) Cancer cells
d) Cancer cells
Which of the following statements is correct about innate and adaptive immunity? a) Both require previous exposure b) Innate immunity is slower than adaptive immunity c) Adaptive immunity is specific to pathogens d) Innate immunity has memory
c) Adaptive immunity is specific to pathogens
Acidity in human sweat is part of which type of immune system? a) Innate immunity b) Adaptive immunity c) Specific immunity d) Acquired immunity
a) Innate immunity
Which of the following are not a constitutive defense? a) Skin b) Mucous membranes c) Antibodies d) Inflammation
c) Antibodies
What is innate immunity and how does it differ from adaptive immunity?
Innate immunity is a non-specific defense present at birth that protects against a wide range of pathogens without prior exposure. It responds rapidly, within hours, and reacts similarly to repeated exposures, unlike adaptive immunity, which is specific, slower to develop, and requires previous exposure.
What are the two main lines of defense in innate immunity and what is their primary function?
The two main lines of defense in innate immunity are the first line, which includes physical and chemical barriers and the microbiome to prevent microbial entry, and the second line, which involves cells and mechanisms that identify and eliminate invaders that bypass the first line.
What role does the complement system play in innate immunity?
The complement system is part of the scanning systems in innate immunity and can trigger phagocytic and inflammatory responses, helping to eliminate pathogens.
Why is the innate immune response considered non-specific?
The innate immune response is considered non-specific because it responds similarly to a wide variety of pathogens and does not require previous exposure to generate a defense.