Lecture Exam 3

Question 1

A symbiotic relationship in which one species benefits from the association while the other species is not harmed but does not benefit from the relationship

Answer 1

Commensalism

Question 2

Which of the following could result in a type II hypersensitivity?

Answer 2

Wrong

Question 3

All the following are true of most diseases caused by fungus except

a. Fungi spores enter the body thru a cut or a wound
b. Fungi could release enzymes that attack host cells
c. Fungi can use its flagellum to expel tissue fluids
d. Fungi produce mycotoxins, which cause disease if ingested by humans

Answer 3

C. Fungi can use its flagellum to expel tissue fluids

Question 4

Giardia intestinalis, a Protozoan, posses the following virulence factor

Answer 4

Adhesive disc

Question 5

Physical barriers of nonspecific defenses

Answer 5

Include both the cells that line the body surfaces and the chemicals they secrete

Question 6

Which statement about chemical barriers is false

a. High salt content of sweat inhibits the growth of bacteria
b. Chemical barriers include mechanism to limit free iron
c. Secreted defensins form pores in microbe membranes
d. Chemical barriers include eosinophils and macrophages

Answer 6

d. Chemical barriers include eosinophils and macrophages

Question 7

Allergens binds to sensitized mast cells carrying surface ____ molecules, causing degranulation

Answer 7

Wrong

Question 8

_____ is the after affects of the disease after recovery

Answer 8

Sequelae

Question 9

Granulocytes include all of the following except

Answer 9

Good

Question 10

Leukocytes responsible for killing intracellular viruses are ____

Answer 10

Natural killer cells

Question 11

Heat pain, redness and swelling are symptoms of

Answer 11

Inflammation

Question 12

The rapid transfer of microbial pathogen through animals of a susceptible species ____

Answer 12

Good

Question 13

Which of the following must be true in order to satisfy some of Koch’s postulates?

Answer 13

Good

Question 14

Toxoid

Answer 14

Good

Question 15

The granulocytes that releases the inflammatory agent histamine is a

Answer 15

Wrong

Question 16

Which of the following does NOT occur in the process of phagocytosis?

Answer 16

Wrong

Question 17

Factors that improve the chances of pathogen’s ability to invade a host and cause infection are known as

Answer 17

Good

Question 18

The spreading of exotoxins from the site of infection via the blood is called

Answer 18

Wrong

Question 19

Some strain of streptococcus pyogenes (flesh eating bacteria is a causative agent of

Answer 19

Good

Question 20

Toll-like receptors

Answer 20

Wrong

Question 21

Type IV hypersensitivity includes

Answer 21

Good

Question 22

The condition that is caused by exogenous and endogenous pyrogens is called

Answer 22

Good

Question 23

HIV has an affinity for cells that bear the ____ antigen (s. on their surface

Answer 23

CD4

Question 24

Gas gangrene, with gas production leading to tissues necrosis is due to

Answer 24

Good

Question 25

Interferons which are stimulated by viruses and ____

Answer 25

Good

Question 26

What is the difference between rubella and rubeola?

Answer 26

Good

Question 27

Cytokines

Answer 27

Wrong

Question 28

Adaptive immunity is ____

Answer 28

Good

Question 29

Injection of a patient with ready-made antibodies produced in a different host is an example of what type of immunity?

Answer 29

Good

Question 30

Injection of a person with a vaccine that induces protective immunity in that individual is an example of what type of immunity

Answer 30

Good

Question 31

Colostrum, which contains high concentrations of antibodies passed onto an infant from a mother during breast-feeding is an example of what type of immunity?

Answer 31

Good

Question 32

HAART (Highly Active Antiretrovial Therapy is

Answer 32

Good

Question 33

A protein molecules produced in a host in response to an agent which is capable of binding to that antigen is a/an

Answer 33

Good

Question 34

Burn infections

Answer 34

Wrong

Question 35

What is the site where stem cells develop into B lymphocytes in humans?

Answer 35

Good

Question 36

All of the following are symptoms of measles except

Answer 36

Good

Question 37

Which class of immunoglobulin consists of five units (pentamer connected by J chains?

Answer 37

Good

Question 38

All of the following have correctly matched antibody class with their function except

Answer 38

Wrong

Question 39

Antigens that have capacity to activate huge numbers of immune T cells non-specifically resulting in a large immune response that results in disease are ____

Answer 39

Good

Question 40

Which of the following T cells secretes lymphokines that further activate B cells to differentiate into plasma cells?

Answer 40

Good

Question 41

Which one is the first antibody to be produced?

Answer 41

Good

Question 42

Hypersensitivity or allergy refers to the immune system responding ____

Answer 42

Good

Question 43

Anaphylaxis is associated with which type of hypersensitivity?

Answer 43

Good

Question 44

Staphylococcus aureus causes all of the following except

Answer 44

Good

Question 45

Scarlet fever can lead to serious complications including

Answer 45

Good

Question 46

Which of the following Staphylococcal infections is matched correctly with the infection site?

Answer 46

Good

Question 47

Which of the following statement about scalded skin syndrome is incorrect?

Answer 47

Wrong

Question 48

Which of the following conditions is associated with the erythrogenic toxin of Streptococcus pyogenes?

Answer 48

Good

Question 49

Debridement

Answer 49

Good

Question 50

Eosinophils are present in large number during worm infections

Answer 50

True

Question 51

1. List the stages of infectious diseases in order And define each stage 2. A women gave birth to a still born, and the test showed that the infant was infected with rubella. Mother’s medical history showed that she was immunized with MMR when she was young and she had no signs or symptoms during or before her pregnancy. She has two children, and they both were born normal. Both were immunized at appropriate age, and her youngest one was immunized 9 months ago. A. How did the mother become infected with rubella? B. What specific test was done on infant that was positive for rubella?

Answer 51

Answer