Innate immunity Knowledge-Based Download PDF

Questions

1. 1.

   Which receptors expressed by cells of the innate immune system recognize conserved microbial molecular structures known as pathogen-associated molecular patterns (PAMPs)?

   • A) Toll-like receptors
   • B) T-cell receptors
   • C) B-cell receptors
   • D) Major histocompatibility complex class II molecules
2. 2.

   Which component of the innate immune system consists of circulating plasma proteins that promote inflammation, coat pathogens for phagocytosis, and assemble into membrane attack complexes to directly lyse target cells?

   • A) Cytokines such as interleukins
   • B) The complement system
   • C) The immunoglobulin superfamily
   • D) Major histocompatibility complex proteins
3. 3.

   Which antimicrobial proteins are produced and released by virus-infected host cells to stimulate neighboring uninfected cells to synthesize antiviral proteins, thereby inhibiting viral replication as part of the innate immune response?

   • A) Histamines
   • B) Lysozymes
   • C) Perforins
   • D) Interferons
4. 4.

   Which cell type functions as part of the innate immune system to destroy virus-infected and cancerous cells by recognizing the absence or downregulation of class I major histocompatibility complex (MHC) molecules?

   • A) Cytotoxic T cell
   • B) Plasma cell
   • C) Natural killer cell
   • D) Helper T cell
5. 5.

   Which of the following is a defining characteristic of innate immunity in the human body?

   • A) Production of high-affinity antibodies by differentiated plasma cells
   • B) Generation of antigen-specific immunological memory following pathogen exposure
   • C) Immediate, non-specific recognition of conserved pathogen-associated molecular patterns
   • D) Clonal selection and proliferation of antigen-specific helper T lymphocytes