MICR 270 Actual Exam Study Questions 100% Solved with Verified Answers
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Course
MICR 270
Institution
MICR 270
What are the goals of the immune system? - Answer Discriminate: Recognize self from
non-self
Eliminate: Destroy non-self (pathogen) and altered self cells (cancer)
- Occurs through the ability of immune cells to initiate immune response
- Antigen enters → recognized → effector cells are act...
MICR 270 Actual Exam Study Questions 100%
Solved with Verified Answers
What are the goals of the immune system? - Answer Discriminate: Recognize self from
non-self
Eliminate: Destroy non-self (pathogen) and altered self cells (cancer)
- Occurs through the ability of immune cells to initiate immune response
- Antigen enters → recognized → effector cells are activated → elimination
What are some of the dysfunctions experienced by the immune system? - Answer
Autoimmunity and hypersensitivity
- Misdirected and Overly active immune system
Immunodeficiency
- Underactive immune system (e.g AIDs)
How are the lymphatic, circulatory, and immune systems related? - Answer Lymphatic:
is the network that drains and filters lymph from blood and interstitial space
Circulatory: Where the lymph comes from/goes after filtration
Immune: Cells can travel between circulatory and lymphatic, can interact with antigen,
travel to site of infection, binds to antigen, and brings to the lymph nodes to eliminate
,What are the primary lymphoid organs and their functions? - Answer Thymus and Bone
Marrow
- T-cell and B-cell maturation to immunocompetent cells
What are the secondary lymphoid organs and their functions? - Answer Spleen, lymph
nodes, MALT
Site of lymphocyte activation to activated effector cells
- Interaction with trapped antigens
What are hematopoietic stem cells? - Answer Every blood cells arise from these cells
(e.g red blood cells, platelets, white blood cells).
What are the functions of erythrocytes/platelets? - Answer Coagulation, wound healing,
fibrinolysis
What are the functions of mast cells? - Answer To trigger acute inflammation
Act as a source of mediators, especially histamine
What are the 6 major infectious agents? - Answer Bacteria
Viruses
Fungi
Parasites
, Protozoa
Prions
What is bacteria? - Answer Unicellular prokaryotic organisms
What are viruses? - Answer Can infect a variety of organisms and relies on host cell for
metabolism and reproduction
What is fungi? - Answer Eukaryotic, form spores, infect upon contact with skin or in
lungs
What are protozoa? - Answer Unicellular heterotrophic, eukaryotes with no cell walls.
Tails allow for rapid, flexible movement
What are helminths? - Answer Parasitic worms?
What are prions? - Answer Proteins that cause degenerative disorders in the brain (e.g
alzheimers)
Explain the innate immune system - Answer The first line of defence against foreign
invaders. Non specific and does not need previous exposure.
Includes physical, soluble, and cellular barriers.
What are physical barriers of the innate immune system? - Answer Structures at the
interface between outside and inside of the body
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