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Natural Killer Cells: Unique Defensive Cells

12 Questions

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Natural Killer Cells: Unique Defensive Cells

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Questions and Answers

What is the main function of natural killer cells?

Killing altered cells (correct)

Producing cytokines

Engulfing foreign microbes

Releasing antibodies

How do natural killer cells recognize their targets?

Without the specificity of lymphocytes (correct)

By forming pseudopods

By engulfing them

Via antibodies

Which process involves the formation of a phagosome?

Adherence

Digestion

Ingestion (correct)

Chemotaxis

What is responsible for killing microbes during phagocytosis?

Lysosomes (D) Signup and view all the answers

Which leukocyte is the first to move from blood to tissue during an inflammatory response?

Neutrophils (A) Signup and view all the answers

What is the major component of pus?

Neutrophils (B) Signup and view all the answers

Which cells use pattern recognition receptors (PRRs) to 'see' pathogen-associated molecular patterns (PAMPs)?

Dendritic Cells (A) Signup and view all the answers

What happens when a PRR binds a PAMP in phagocytosis?

Stimulation of pro-inflammatory cytokine secretion (B) Signup and view all the answers

What is the role of resident macrophages in the initial response to tissue damage?

Phagocytose pathogens and release cytokines (A) Signup and view all the answers

Which of the following is NOT a function of inflammation?

Activate an adaptive immune response (B) Signup and view all the answers

How do phagocytes contribute to the immune response?

Phagocytose pathogens and present antigens (D) Signup and view all the answers

What is the purpose of vasodilation and increased permeability of blood vessels during inflammation?

To prevent spread of infection to other tissues (D) Signup and view all the answers