Unit 3 Quizzes Flashcards
Fungal cell membranes typically contain
Ergosterol
Fungal infections which affect the skin as well as the underlying connective and muscle tissue are called
subcutaneous mycoses
The skin and the mucous membranes are similar in which of the following aspects?
Both have epithelial cells packed closely together.
First line defenses have what aspect in common with each other?
They are physical barriers against invading pathogens.
Which of the following is a function of normal microbiota?
consuming nutrients required by pathogens
Which of the following is NOT true about toll receptors?
Toll-like receptors are molecules found on the surface of microbes that can initiate immune reactions.
The process of phagocytosis involve all of the following EXCEPT
chemotaxis
exocytosis
vesicle fusion
killing by Neutrophil Extracellular Traps
The phenomenon known as chemotaxis is defined as
the movement of a cell toward or away from a chemical stimulus.
Which of the following is involved in chemotaxis?
C5a
Opsonization is
the coating of a pathogen by complement to facilitate phagocytosis.
Which of the cells listed below can present antigens on Class II MHC proteins?
a.
Virus infected epithelial cells
b.
Healthy epithelial cells
c.
Tumor cells
d.
Macrophages
What is the function of the CD8 receptor?
a.
Bind to MHC molecules
b.
Produce gamma interferon
c.
Produce IL-2
d.
Activate cytokines
T helper cells produce cytokines that activate
Cytotoxic T cells, macrophages, B cells
Which type of cell directly attacks infected cells?
a.
Cancerous cells
b.
Cytotoxic T cells
c.
Helper T cells
d.
Bacterial cells
What is the role of plasma cells in humoral immunity?
a.
Plasma cells activate the complement system.
b.
Plasma cells are phagocytes.
c.
Plasma cells produce antibodies.
d.
Plasma cells engulf viruses.
e.
Plasma cells neutralize toxins.
