60 Questions
Which cells are considered part of the adaptive immune system?
Gamma delta T cells
Which cells have innate functions and do not require antigen presentation for activation?
Gamma delta T cells
Which cells are involved in regulating the innate immune system and maintaining homeostasis?
Innate lymphoid cells
Which cells are responsible for phagocytosis and antigen presentation to induce the adaptive immune response?
Dendritic cells
Which type of immune response is being discussed in the text?
Innate immune response
What is receptor mediated phagocytosis?
A process by which pathogens are engulfed and destroyed by immune cells
What is the role of the Inflammasome?
To drive the production of certain cytokines
What is the acute phase response?
A measure of inflammatory events
Why do the receptors of the innate immune system recognize conserved structures instead of specific antigens?
Because specific antigens can mutate and change
What are the receptors of the innate immune system called?
Pattern recognition receptors
What do toll-like receptors primarily detect?
Pathogen-associated molecular patterns (PAMPs)
In addition to pathogens, what else can activate the receptors of the innate immune system?
Host molecules
What is the process by which leukocytes attach to the blood vessel wall and squeeze through to the site of infection?
Adhesion
Which cells are mainly responsible for capturing foreign particles and digesting them?
Neutrophils
What are the types of receptors present on professional phagocytic cells that help them recognize pathogens?
Complement receptors
What is the process by which pathogens or microbes are taken up by phagocytic cells?
Phagocytosis
What is the function of the tier domain in toll-like receptors?
It is a shared domain among all toll-like receptors
Which toll-like receptor can form dimers with both TLR1 and TLR6?
TLR2
Where are toll-like receptors primarily located?
On the cell surface
What types of molecules can toll-like receptors recognize?
Proteins and nucleic acids
What are toll receptors?
Receptors that are important for development in fruit flies
What is the role of c-type lectin receptors?
To recognize glycan structures on pathogens
What did the discovery of toll receptors in fruit flies reveal?
The importance of toll receptors in innate immunity
What did Bruce Beutler discover in his work on mice embryos?
The mammalian equivalent of toll receptors
Which two pathways are mentioned in the text?
Mediator-dependent and mediator-independent
Which proteins do toll-like receptors use to trigger signaling?
Adaptive proteins
What determines the type of output toll-like receptors have?
The adaptors they use
What are some of the outputs produced by toll-like receptors?
All of the above
What do toll-like receptors induce at the site of infection?
Inflammation
What determines how toll-like receptors use adaptive molecules?
The tier being looked at
Which cells are responsible for releasing cytokines that dilate local blood vessels?
Macrophages
What is the process by which neutrophils capture and digest foreign particles?
Phagocytosis
What are the molecules that bind to integrins on leukocytes to facilitate their binding to the endothelium?
Cell adhesion molecules
What is the term for the special form of cell death in which neutrophils release nuclear chromatin to trap microorganisms?
NETosis
Which receptors on professional phagocytic cells recognize pathogens through binding to pathogen-associated molecular patterns (PAMPs)?
Mannose receptor
What is the term for the group of receptors that recognize conserved structures on pathogens?
Pattern recognition receptors
Which cells are considered part of the innate immune system and are present at intestinal and pulmonary mucosal tissues?
Innate lymphoid cells
What is the term for the process by which leukocytes attach to the blood vessel wall and squeeze through to the site of infection?
Diapedesis
Which cells release antimicrobial molecules called Neutrophil Extracellular Traps (NETs)?
Neutrophils
What is the term for the process by which foreign particles are captured and digested by phagocytic cells?
Phagocytosis
Which two NLRCs have a leucine rich domain that can bind to peptidoglycan?
NLRC1 and NLRC2
Which peptide of peptidoglycan does NOD1 specifically bind to?
γ-glutamyl diaminopimelic acid (iE-DAP)
Which peptide of peptidoglycan does NOD2 specifically bind to?
Muramyl dipeptide
Which gain of function mutation in NOD2 is linked to early onset sarcoidosis?
Gain of function mutation
Which loss of function mutation in NOD2 is associated with susceptibility to Crohn's disease?
Loss of function mutation
Which NLRP is the most well-characterized?
NLRP3 (NALP3)
What activates NLRP3?
Cellular stress, K+ efflux, ATP, reactive oxygen species, and lysosomal damage
Which protein is responsible for the cleavage of pro-IL-1 and pro-IL-18 in the NLRP3 inflammasome?
Caspase 1
Which receptors are sensors of cytoplasmic RNA?
RIG-I and MDA5
Which receptor preferentially recognizes long double stranded RNA?
MDA5
Which receptors are able to recognize conserved structures termed pathogen-associated molecular patterns (PAMPs)?
Toll-like receptors (TLRs)
Which receptors are predominantly endosomal and recognize double-stranded RNA (dsRNA)?
TLR3
Which receptors are expressed by most cells that phagocytose microbes and bind to glycan structures present on pathogens?
C type lectin receptors (CLRs)
Which receptors play an important role in development and immunity to fungal and bacterial infections in fruit flies?
Toll-like receptors (TLRs)
Which receptors form functional hetero/homodimers and induce the production of pro-inflammatory cytokines, MHC molecules, and antimicrobial peptides?
Toll-like receptors (TLRs)
Which receptors are cytoplasmic pattern recognition molecules and can be classified into two major groups: NLRCs and NLRPs?
NOD-like receptors (NLRs)
Which receptors are predominantly located on the cell surface and recognize bacterial products such as lipopolysaccharide (LPS) and flagellin?
TLR1/2
Which receptors are associated with diseases such as HIV, systemic lupus erythematosus, Alzheimer's Disease, atherosclerosis, sepsis, and tuberculosis?
Toll-like receptors (TLRs)
Which receptors play a role in receptor-mediated phagocytosis and inducing the adaptive immune response?
Pattern recognition receptors (PRRs)
Which receptors are responsible for recognizing damage-associated molecular patterns (DAMPs) released from necrotic cells?
Pattern recognition receptors (PRRs)
Test your knowledge of light receptors and their structure with this quiz. Explore the role of leucine rich repeats, active domains, and their location within the cell.
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