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Micb 212 ubc Exam Practice Questions and Answers

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Micb 212 ubc Exam Practice Questions and Answers how do humans and vertebrae protect themselves? - ANSWERwith a complex array of defensive mechanisms The body has how many levels of defence against infection - ANSWER3 ( Anatomical and physiological barriers, innate, adaptive) Anatomical and p...

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  • October 30, 2024
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Micb 212 ubc Exam Practice Questions

and Answers


how do humans and vertebrae protect themselves? - ANSWER✔✔with a complex array of defensive

mechanisms


The body has how many levels of defence against infection - ANSWER✔✔3 ( Anatomical and

physiological barriers, innate, adaptive)


Anatomical and physiological barriers - ANSWER✔✔-intact skin provides a physical barrier


-mucosal surfaces of the gut, respiratory urogenital and conjunctivae surfaces,


-stomach acid, lysozyme and other antimicrobial body secretions.


physical barriers - ANSWER✔✔Epithelial tissue blocks the entry of parasites


Tight junctions


biochemical defenses - ANSWER✔✔fatty acids, acidity, lysozyme, mucus


The innate immune responses are the initial internal defences. - ANSWER✔✔-quick and non-specific,



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-involves phagocytosis and activation of the complement proteins,


-limits the spread of infection,


-often resolves the infection.


-do not improve with exposure to the same pathogen


functions of innate system - ANSWER✔✔1)phagocytosis


2)opsonization


3)activation of the complement cascade


4)chemotaxis of phagocytic cells


5)inflammation


Two parts of the innate system - ANSWER✔✔1)Immediate response


2)Induced response


The adaptive immune responses are the last line of defence. - ANSWER✔✔slow to respond but specific

to the particular pathogen,


involve antibody-mediated responses and cell-mediated responses.


Erythrocytes are - ANSWER✔✔erythrocytes( red blood) carry oxygen tissues

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Leukocytes are - ANSWER✔✔leukocytes (white blood cells) are the cells of the immune system.


Granulocytes - ANSWER✔✔A group of leukocytes containing granules in their cytoplasm; neutrophils,

eosinophils, basophils.


- granules in the cytosol contain lots of anti microbial factors


process in which contents of granules are released into the extracellular space -

ANSWER✔✔degranulation


HSCs (hematopoietic stem cells) - ANSWER✔✔-all blood cells arise from


-self-renewing stem cells,


Where are HSCs found and how do they develop - ANSWER✔✔-bone marrow and umbilical cord blood


- location, environmental cues( cytokines and growth factor) w


Leukocytes (2 types) - ANSWER✔✔myeloid cells and lymphoid cells


Myeloid cells - ANSWER✔✔-innate immune responses


-monocytes (that mature into macrophages),


-mast cells, and


-granulocytes (neutrophils, basophils, and eosinophils).

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