Immunity Packet Answer Key

University:
University of Ottawa
Course:
BIO1130 | Introduction to Organismal Biology
Academic year:

2022
Views:

257

Pages:

6
Author:

kortmouebf7y

Name· How does our immune system protect us from disease? Model 1 - Cell Mediated Response Why? One way in which organisms maintain hoIµeostasis is by detecting foreign cells and particles like patho gens and cancer cells. Once the pathogen is detected and identified, other systems in the organism's body can attack the invader, thus keeping the organism healthier. Cells of the human immune system are finely . tuned to recognize and respond quicldy to disease-causing organisms. _________,___ L In Model 1 a patho gen (virus, bacteria, foreign protein, parasite) has entered the bloodstream of au individual. Draw the symbol that represents the pathogen. 2. Ouc response· of the human ·immune system is endocytosis of a pathogen by a phagocyte (a type of white blood cell). Refer to Model l. a. Which diagram in the cell mediated response illustration shows d1is process? b. In yot1r drawing above, circle the specialized surface proteins on the helper T-ce!L 4. According to Model 1, are all helperT-cells the same? Justify your answer with specific evidence