Lymphatic & Immune System

Immunological memory means that [what].

later exposures trigger a faster and stronger adaptive response

Passive immunity is characterized by [what].

- receiving antibodies from another person or animal

- short-term protection

How do Natural Killer (NK) cells kill infected cells?

Using Fas ligand, perforins, and granzymes to trigger apoptosis

What is the primary function of IgA antibodies in mucosal tissues?

Neutralize pathogens and prevent attachment to host cells

How can virally infected cells avoid or escape T cells?

Reducing MHC I expression

Which pair includes primary lymphoid organs?

Bone marrow and thymus

Pathogen strategies to evade the immune system include all of the following EXCEPT ... [what]

Increasing antibody production in the host

Where do B cells mature?

Bone marrow

Treatments for autoimmune diseases generally focus on [what].

reducing symptoms with immunosuppressive or anti-inflammatory drugs

What is the main function of phagocytes?

Engulf and destroy pathogens

Lymphatic drainage is asymmetrical because [why].

the right lymphatic duct drains only the upper right side

What is the function of NK (Natural Killer) cells?

Kill virus-infected and cancer cells quickly

What is the function of plasma cells?

Secrete antibodies

Why is MHC matching important in organ transplants?

Mismatched MHC triggers T cell-mediated rejection

The lymphatic system helps the body by [what].

-Draining extra fluid

-Filtering germs/pathogens

-Transporting immune cells

A patient has a bacterial infection in the blood. Which immune factor would help neutralize bacteria and trigger phagocytosis?

IgG

A patient with influenza has clonal expansion of cytotoxic T cells. Why is this important?

Kills many infected cells efficiently

A patient has herpesvirus-associated Kaposi sarcoma. Which immune response(s) help control early cancer cells?

NK cells

A bacterial infection in blood triggers complement activation. Which effect occurs?

Lysing bacteria

Fungal pneumonia requires immune responses that activate phagocytes. Which factor is key?

Th1 cells and macrophages