Question

16. upon recognition of pathogen, b cells will trigger

a.antibody production and formation of memory cells

b. cell destruction via cytotoxic t cells

c. inflammation and interferon cascades

d. all of the above

17. an infected body cell will display __ and be recognized by __

a. MHC I and MHC II surface markers; cytotoxic and helper t cells

b. MHC I surfacee markers with an antigen; cytotoxic t cells ( CD8)

c. MHC II surface markers with ana antigen; helper t cells (CD4)

d. MHC X surface markers with an antigen; cytotoxic and helper t cells

19. what is one example of the fate of a pathogen after it has been tagged by an antibody?

a. antibodies carry the pathogen to lymphoid tissues for destruction

b. antibodies quickly bind to and degrade the pathogen surface

c. antibodies remove and destroy cellular proteins inside the pathogen

d. antibodies trigger the complement system to lyse the pathogen

20. Upon recognition of a pathogen, the role of the helper t cell (CD4) is to:

a. activate b cells

b. activate cytotoxic t cells

c. attract neutrophils and macrophages

d. all of the above

21. memory b cells within the immune system will respond during the ___

a. innate immune response

b. intermediate immune response

c. primary immune response

d. secondary immune response

23. which of the following contains all of the correct structures in the conducting zone?

a. bronchi, terminal bronchioles, respiratory bronchioles, alveoli

b. nasal cavity, pharynx,larynx, trachea, bronchi, terminal bronchioles

c. pharynx, larynx, trachea, bronchi

d. respiratory bronchi, alveoli

24. the function of cilia and mucus in the respiratory tract is:

a. facilitate movement of particles into the lungs

b. increases surface area for diffusion in the lungs

c. trap and remove debris from the respiratory passageways

d. all of the above

Answer 1

16.Upon recognition of pathogen, B cells Primary immune respose initiates which trigger inflammation and interferons cascade and cell destruction through cytotoxic T cells after which antibody and memory cells formation takes place.Thus D is correct.

17. An infected body cell will display MHC I Protein along with viral antigen which are recognized by cytotoxic and helper t cells and destruction of infected cell occur afterward memory cells forms.Thus B is correct.

19. There are 3 fates of a pathogen after is it being tagged by an antibody

• Neutralisation:Antibody prevent binding of pathogen to their target
• Opsonization :Pathogen tagged by antibody moelcule gets consumed by macrophages or neutrophils.
• Complement system activation :Antibody attached to pathogen activate complement system and lysis of pathogen takes place

Thus D is correct.

20.On recognition of pathogen CD4(T cells) produces diffrent type of T cells that perform several actions:

• TH1 cells helps activate the macrophages and cytotoxic T cells
• TH2 cells help activate B cells
• TH17 cells help recruiting neutrophils and macrophages

Thus D is correct.

21.Memory B cells are formed after primary response and respond during secondary immune response .Thus D is correct.

23. Conducting zone of the respiratory system is made up of the nose, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles.Thus B is correct.

24. Function of cillia and mucus is to trap the pathogen and debris in respiratory tract and push it out of the respiratory pathway through cilliary movement .Thus C is correct.