MICR 270 Actual Exam with Questions and 100% Verified Answers
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Course
MICR 270
Institution
MICR 270
Once a pathogen is eliminated, the vast majority of lymphocytes undergo
_______________ the immune response gradually increases/declines - Answer
apoptosis
declines
What happens to the cells that survive the contraction phase? - Answer They become
memory cells
MICR 270 Actual Exam with Questions and
100% Verified Answers
Once a pathogen is eliminated, the vast majority of lymphocytes undergo
_______________ the immune response gradually increases/declines - Answer
apoptosis
declines
What happens to the cells that survive the contraction phase? - Answer They become
memory cells
What is the contraction phase? - Answer After pathogens have been eliminated,
apoptosis occurs to most activated lymphocytes
Name the phases of the adaptive immune response? - Answer ALEC Maldwin
Antigen recognition
Lymphocyte activation
Elimination of pathogens
Contraction
Memory
Why does the adaptive immune system need a process called antigen presentation? -
Answer Adaptive system has many specific cells, each able to recognize one antigen.
Antigen presentation is important to determine which cells need to be activated to
encounter specific invader during an infection
Which processes are induced during lymphocyte activation? - Answer Differentiation
Clonal Expansion
, At which step of the adaptive immune response is it determined if the type of immunity
induced is Humoral or Cell-Mediated? - Answer It's a non-specific attack - host mounts
both systems to clear pathogen.
What is the best way to fashion new therapies against certain pathogens? - Answer
Finding out which adaptive immune response (humoral or cell-mediated) worked
against pathogen
Why do immune cells die after elimination of pathogen? - Answer No longer needed,
would take up too much energy in body.
Could also cause more damage.
Main advantage of memory cell? - Answer Reinfection by same pathogen can be
automatically targeted.
What does MHC stand for? - Answer major histocompatibility complex
Which mechanism allows for the differentiation of self vs. non self? - Answer MHC.
Ensures host doesn't attack itself.
Which molecules display antigenic peptides on the surface of cells? - Answer MHC
The MCH-Antigen complex can be recognized by what? - Answer T-Cell receptor and its
co-receptors (CD4, CD8) to initiate adaptive immune response
What are the two classes of major histocompatibility complex's? - Answer MHC1 and
MHC2
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