14-16

Question 1

T/F - immunoglobulin G is the largest in molecular weight of the five classes of immunoglobulins

Answer 1

false

Question 2

T/F - rickettsias and chlamydias are examples of obligate intracellular pathogens

Answer 2

true

Question 3

T/F - it is thought that the waves in the cell walls of mycobacterium tuberculosis protect this pathogen from digestion within phagocytes

Answer 3

true

Question 4

T/F - although most people use the terms “infection” and “infectious disease” synonymously, microbiologists define infection as colonization by a pathogen

Answer 4

true

Question 5

T/F - if a person’s immune system is not functioning properly, then that person is said to be immunocompetent

Answer 5

false

Question 6

T/F - an immunoglobulin M (IgM) molecule can bind to 10 antigenic determinants, but they would all have to be the antigenic determinant that stimulated the production of the IgM molecule

Answer 6

true

Question 7

T/F - lactoferrin and transferrin are proteins that bind iron, and, therefore, deprive pathogens of this essential nutrient

Answer 7

true

Question 8

T/F - a headache is a classic example of a sign of a disease

Answer 8

false

Question 9

T/F - eosinophils are much better phagocytes than neutrophils

Answer 9

false

Question 10

T/F - with respect to a particular pathogen, detection of antibodies in a patient’s blood provides better proof of current infection than does detection of antigens

Answer 10

false

Question 11

T/F - common allergic reactions, such as those experienced in hay fever, are also known as anaphylactic reactions

Answer 11

true

Question 12

T/F - phagocytes can only ingest objects that they are able to attach to

Answer 12

true

Question 13

T/F - autoimmune diseases are always the result of type II hypersensitivity reactions

Answer 13

false

Question 14

T/F - the terms “leukemia” and “leukopenia” both refer to an abnormally low number of circulating leukocytes

Answer 14

false

Question 15

T/F - avirulent strains do not cause disease

Answer 15

true

Question 16

T/F - bacterial capsules protect bacteria from being phagocytized by leukocytes

Answer 16

true

Question 17

T/F - to cause disease, all bacterial pathogens must first attach to some tissue in the body

Answer 17

false

Question 18

T/F - perspiring, swallowing, and urinating are all considered to be part of the first line of defense

Answer 18

true

Question 19

T/F - pyrogenic substances cause the production of pus

Answer 19

false

Question 20

T/F - the exoenzyme that causes toxic shock syndrome is called erythrogenic toxin

Answer 20

false

Question 21

T/F - interferons are virus specific, but not species specific

Answer 21

false

Question 22

T/F - ehrlichia spp. are intraleukocytic pathogens

Answer 22

true

Question 23

T/F - technically speaking, all antibodies are immunoglobulins, but not all immunoglobulins are antibodies

Answer 23

true

Question 24

T/F - babesai spp. and plasmodium spp. are examples of intraerythrocytic pathogens

Answer 24

true

Question 25

T/F - immunoglobulin M antibodies and basophils play a major role in anaphylactic reactions

Answer 25

false

Question 26

T/F - chemokines are chemotactic agents that are produced by various cells of the human body

Answer 26

true

Question 27

T/F - the primary function of natural killer cells is to kill foreign cells, virus-infected cells, and tumor cells

Answer 27

true

Question 28

T/F - the neurotoxin produced by Clostridium tetani causes a spastic, rigid type of paralysis

Answer 28

False

Question 29

T/F - complement is the name of a single plasma protein that "complements" the actions of the immune system

Answer 29

false

Question 30

T/F - the penicillin molecule is an example of a hapten

Answer 30

true