Unit 3 Quizzes Flashcards

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1
Q

Fungal cell membranes typically contain

A

Ergosterol

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2
Q

Fungal infections which affect the skin as well as the underlying connective and muscle tissue are called

A

subcutaneous mycoses

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3
Q

The skin and the mucous membranes are similar in which of the following aspects?

A

Both have epithelial cells packed closely together.

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4
Q

First line defenses have what aspect in common with each other?

A

They are physical barriers against invading pathogens.

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5
Q

Which of the following is a function of normal microbiota?

A

consuming nutrients required by pathogens

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6
Q

Which of the following is NOT true about toll receptors?

A

Toll-like receptors are molecules found on the surface of microbes that can initiate immune reactions.

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7
Q

The process of phagocytosis involve all of the following EXCEPT

A

chemotaxis
exocytosis
vesicle fusion
killing by Neutrophil Extracellular Traps

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8
Q

The phenomenon known as chemotaxis is defined as

A

the movement of a cell toward or away from a chemical stimulus.

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9
Q

Which of the following is involved in chemotaxis?

A

C5a

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10
Q

Opsonization is

A

the coating of a pathogen by complement to facilitate phagocytosis.

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11
Q

Which of the cells listed below can present antigens on Class II MHC proteins?

A

a.
Virus infected epithelial cells
b.
Healthy epithelial cells
c.
Tumor cells
d.
Macrophages

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12
Q

What is the function of the CD8 receptor?

A

a.
Bind to MHC molecules

b.
Produce gamma interferon
c.
Produce IL-2
d.
Activate cytokines

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13
Q

T helper cells produce cytokines that activate

A

Cytotoxic T cells, macrophages, B cells

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14
Q

Which type of cell directly attacks infected cells?

A

a.
Cancerous cells
b.
Cytotoxic T cells

c.
Helper T cells
d.
Bacterial cells

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15
Q

What is the role of plasma cells in humoral immunity?

A

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.

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