T1 L3: Innate immune defences & inflammation 2 (SS)
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Questions and Answers

Which cells are considered part of the adaptive immune system?

  • Gamma delta T cells (correct)
  • Dendritic cells
  • Monocytes
  • Innate lymphoid cells

Which cells have innate functions and do not require antigen presentation for activation?

  • Gamma delta T cells (correct)
  • Innate lymphoid cells
  • Monocytes
  • Natural killer cells

Which cells are involved in regulating the innate immune system and maintaining homeostasis?

  • Dendritic cells
  • Natural killer cells
  • Innate lymphoid cells (correct)
  • Monocytes

Which cells are responsible for phagocytosis and antigen presentation to induce the adaptive immune response?

<p>Dendritic cells (B)</p> Signup and view all the answers

Which type of immune response is being discussed in the text?

<p>Innate immune response (A)</p> Signup and view all the answers

What is receptor mediated phagocytosis?

<p>A process by which pathogens are engulfed and destroyed by immune cells (B)</p> Signup and view all the answers

What is the role of the Inflammasome?

<p>To drive the production of certain cytokines (A)</p> Signup and view all the answers

What is the acute phase response?

<p>A measure of inflammatory events (A)</p> Signup and view all the answers

Why do the receptors of the innate immune system recognize conserved structures instead of specific antigens?

<p>Because specific antigens can mutate and change (D)</p> Signup and view all the answers

What are the receptors of the innate immune system called?

<p>Pattern recognition receptors (B)</p> Signup and view all the answers

What do toll-like receptors primarily detect?

<p>Pathogen-associated molecular patterns (PAMPs) (D)</p> Signup and view all the answers

In addition to pathogens, what else can activate the receptors of the innate immune system?

<p>Host molecules (D)</p> Signup and view all the answers

What is the process by which leukocytes attach to the blood vessel wall and squeeze through to the site of infection?

<p>Adhesion (D)</p> Signup and view all the answers

Which cells are mainly responsible for capturing foreign particles and digesting them?

<p>Neutrophils (B)</p> Signup and view all the answers

What are the types of receptors present on professional phagocytic cells that help them recognize pathogens?

<p>Complement receptors (B)</p> Signup and view all the answers

What is the process by which pathogens or microbes are taken up by phagocytic cells?

<p>Phagocytosis (A)</p> Signup and view all the answers

What is the function of the tier domain in toll-like receptors?

<p>It is a shared domain among all toll-like receptors (B)</p> Signup and view all the answers

Which toll-like receptor can form dimers with both TLR1 and TLR6?

<p>TLR2 (B)</p> Signup and view all the answers

Where are toll-like receptors primarily located?

<p>On the cell surface (D)</p> Signup and view all the answers

What types of molecules can toll-like receptors recognize?

<p>Proteins and nucleic acids (C)</p> Signup and view all the answers

What are toll receptors?

<p>Receptors that are important for development in fruit flies (A)</p> Signup and view all the answers

What is the role of c-type lectin receptors?

<p>To recognize glycan structures on pathogens (C)</p> Signup and view all the answers

What did the discovery of toll receptors in fruit flies reveal?

<p>The importance of toll receptors in innate immunity (A)</p> Signup and view all the answers

What did Bruce Beutler discover in his work on mice embryos?

<p>The mammalian equivalent of toll receptors (A)</p> Signup and view all the answers

Which two pathways are mentioned in the text?

<p>Mediator-dependent and mediator-independent (C)</p> Signup and view all the answers

Which proteins do toll-like receptors use to trigger signaling?

<p>Adaptive proteins (A)</p> Signup and view all the answers

What determines the type of output toll-like receptors have?

<p>The adaptors they use (D)</p> Signup and view all the answers

What are some of the outputs produced by toll-like receptors?

<p>All of the above (D)</p> Signup and view all the answers

What do toll-like receptors induce at the site of infection?

<p>Inflammation (C)</p> Signup and view all the answers

What determines how toll-like receptors use adaptive molecules?

<p>The tier being looked at (D)</p> Signup and view all the answers

Which cells are responsible for releasing cytokines that dilate local blood vessels?

<p>Macrophages (C)</p> Signup and view all the answers

What is the process by which neutrophils capture and digest foreign particles?

<p>Phagocytosis (B)</p> Signup and view all the answers

What are the molecules that bind to integrins on leukocytes to facilitate their binding to the endothelium?

<p>Cell adhesion molecules (B)</p> Signup and view all the answers

What is the term for the special form of cell death in which neutrophils release nuclear chromatin to trap microorganisms?

<p>NETosis (B)</p> Signup and view all the answers

Which receptors on professional phagocytic cells recognize pathogens through binding to pathogen-associated molecular patterns (PAMPs)?

<p>Mannose receptor (C)</p> Signup and view all the answers

What is the term for the group of receptors that recognize conserved structures on pathogens?

<p>Pattern recognition receptors (D)</p> Signup and view all the answers

Which cells are considered part of the innate immune system and are present at intestinal and pulmonary mucosal tissues?

<p>Innate lymphoid cells (C)</p> Signup and view all the answers

What is the term for the process by which leukocytes attach to the blood vessel wall and squeeze through to the site of infection?

<p>Diapedesis (D)</p> Signup and view all the answers

Which cells release antimicrobial molecules called Neutrophil Extracellular Traps (NETs)?

<p>Neutrophils (C)</p> Signup and view all the answers

What is the term for the process by which foreign particles are captured and digested by phagocytic cells?

<p>Phagocytosis (B)</p> Signup and view all the answers

Which two NLRCs have a leucine rich domain that can bind to peptidoglycan?

<p>NLRC1 and NLRC2 (C)</p> Signup and view all the answers

Which peptide of peptidoglycan does NOD1 specifically bind to?

<p>γ-glutamyl diaminopimelic acid (iE-DAP) (C)</p> Signup and view all the answers

Which peptide of peptidoglycan does NOD2 specifically bind to?

<p>Muramyl dipeptide (C)</p> Signup and view all the answers

Which gain of function mutation in NOD2 is linked to early onset sarcoidosis?

<p>Gain of function mutation (D)</p> Signup and view all the answers

Which loss of function mutation in NOD2 is associated with susceptibility to Crohn's disease?

<p>Loss of function mutation (B)</p> Signup and view all the answers

Which NLRP is the most well-characterized?

<p>NLRP3 (NALP3) (C)</p> Signup and view all the answers

What activates NLRP3?

<p>Cellular stress, K+ efflux, ATP, reactive oxygen species, and lysosomal damage (D)</p> Signup and view all the answers

Which protein is responsible for the cleavage of pro-IL-1 and pro-IL-18 in the NLRP3 inflammasome?

<p>Caspase 1 (C)</p> Signup and view all the answers

Which receptors are sensors of cytoplasmic RNA?

<p>RIG-I and MDA5 (B)</p> Signup and view all the answers

Which receptor preferentially recognizes long double stranded RNA?

<p>MDA5 (A)</p> Signup and view all the answers

Which receptors are able to recognize conserved structures termed pathogen-associated molecular patterns (PAMPs)?

<p>Toll-like receptors (TLRs) (B)</p> Signup and view all the answers

Which receptors are predominantly endosomal and recognize double-stranded RNA (dsRNA)?

<p>TLR3 (D)</p> Signup and view all the answers

Which receptors are expressed by most cells that phagocytose microbes and bind to glycan structures present on pathogens?

<p>C type lectin receptors (CLRs) (D)</p> Signup and view all the answers

Which receptors play an important role in development and immunity to fungal and bacterial infections in fruit flies?

<p>Toll-like receptors (TLRs) (D)</p> Signup and view all the answers

Which receptors form functional hetero/homodimers and induce the production of pro-inflammatory cytokines, MHC molecules, and antimicrobial peptides?

<p>Toll-like receptors (TLRs) (B)</p> Signup and view all the answers

Which receptors are cytoplasmic pattern recognition molecules and can be classified into two major groups: NLRCs and NLRPs?

<p>NOD-like receptors (NLRs) (D)</p> Signup and view all the answers

Which receptors are predominantly located on the cell surface and recognize bacterial products such as lipopolysaccharide (LPS) and flagellin?

<p>TLR1/2 (D)</p> Signup and view all the answers

Which receptors are associated with diseases such as HIV, systemic lupus erythematosus, Alzheimer's Disease, atherosclerosis, sepsis, and tuberculosis?

<p>Toll-like receptors (TLRs) (C)</p> Signup and view all the answers

Which receptors play a role in receptor-mediated phagocytosis and inducing the adaptive immune response?

<p>Pattern recognition receptors (PRRs) (D)</p> Signup and view all the answers

Which receptors are responsible for recognizing damage-associated molecular patterns (DAMPs) released from necrotic cells?

<p>Pattern recognition receptors (PRRs) (C)</p> Signup and view all the answers

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