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Microbiology, Fifth Edition
Microbiology, 5/e
Lansing M Prescott, Augustana College
Donald A Klein, Colorado State University
John P Harley, Eastern Kentucky University
Normal Microbiota and Nonspecific Host Resistance

True or False Quiz

Choose T or F



1

Germfree animals are anatomically and physiologically normal.
A)True
B)False
2

The actual proportions of the individual populations within the indigenous microbiota depend largely on a person's diet.
A)True
B)False
3

The adult female genital tract has a complex microbiota that constantly changes with the female menstrual cycle.
A)True
B)False
4

Certain probiotic microorganisms offer considerable health benefits for humans, including potential anticarcinogenic activity.
A)True
B)False
5

The lactobacilli in the female genital tract maintain a high pH and inhibit colonization by pathogenic bacteria.
A)True
B)False
6

The corynebacteria on the skin produce fatty acids that inhibit colonization by pathogenic bacteria.
A)True
B)False
7

The nonspecific immune response lacks immunological memory.
A)True
B)False
8

Specific immune response occur to the same extent on repeated exposure to foreign antigens.
A)True
B)False
9

Basophils, unlike eosinophils, are mobile cells that can migrate from the bloodstream into tissue spaces.
A)True
B)False
10

Only approximately 10% of the precursor T-cells become mature and enter the bloodstream.
A)True
B)False
11

Lactoferrin, which sequesters iron from the plasma, is released by activated macrophages and PMNs.
A)True
B)False
12

General urinary tract infections are much more common in females than in males due to the anatomical differences in length of the urethra.
A)True
B)False
13

Cytokines are required for immunoregulation of both specific and nonspecific responses.
A)True
B)False
14

Interferons usually are species specific but virus nonspecific.
A)True
B)False








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