30 Questions
What is the role of Natural Killer (NK) cells?
Killing tumor cells, fungi, and virus-infected cells
Where do B lymphocytes mature?
Bone marrow
What is the main function of Neutrophils during infections?
Releasing hydrolytic enzymes
Which cell type is least common among granulocytes?
Basophils
What is the distinctive feature of Natural Killer (NK) cells?
Having large size and prominent granulation
From which cell type are Macrophages derived?
Monocytes
What is one of the mechanisms of antigen elimination mentioned in the text?
T cell proliferation
Which type of cell is cytotoxic to some tumor cells and can stimulate T cell proliferation and IL-2 production according to the text?
NK cell
What is a recommended management approach for viral infections as mentioned in the text?
Supportive treatment
In the context of Covid-19 pneumonia, what is stressed by the Department of Health (DOH) regarding antibiotic usage?
Avoid antibiotic usage
Which of the following components helps in neutralizing microbes and toxins by opsonization and phagocytosis?
Phagocytes
What is the primary function of Colony-Stimulating Factors according to the text?
Directing bone marrow stem cell division
What is the significance of specificity in the immune system?
Ability to recognize and respond to many different microbes
Which role of the immune system implies the potential for immunotherapy of cancer?
Defense against tumors
What does clonal expansion in the immune system refer to?
Keeping pace with rapidly proliferating microbes
How does the immune system achieve nonreactivity to self?
Preventing injurious immune responses against host cells
Which type of immunity results from our body developing antibodies as a defense mechanism?
Active immunity
What is the main function of polymorphonuclear leukocytes (neutrophils) in the immune response?
Response against infections
What is the function of C3a in the complement pathway?
Induces inflammation
In the alternative pathway, what helps stabilize the C3 convertase (C3bBb)?
Properdin
Which component of the complement pathway is responsible for opsonization and phagocytosis?
C3b
What initiates the classic pathway of the complement system?
C1
Which component of the complement system constitutes the membrane attack complex?
C5-9
Which type of immunoglobulin makes up 20% of the protein in blood plasma?
IgG
Which mechanism involves the release of lymphokines or cytokines directly affecting effector cells?
Third mechanism
In which type of hypersensitivity reaction do antigens react with IgE bound to mast cells causing degranulation and the release of histamine?
Type I (Anaphylactic)
Which function is NOT associated with histamine in the context of hypersensitivity reactions?
Cytokine secretion
Which hypersensitivity reaction involves immune complex deposition in vessel walls and other substances?
Type III (Immune Complex)
What is the primary mediator involved in the Type I (Anaphylactic) hypersensitivity reaction?
Histamine
Which condition is NOT an example given for Type I (Anaphylactic) hypersensitivity reactions?
Autoimmune diseases
Test your knowledge on the mechanism of antigen elimination, T cell proliferation stimulation, IL-2 production, and antiviral functions. Explore the role of interferons in antiviral responses and the considerations for antibiotic use in Covid-19 pneumonia cases.
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