The causative agent for elephantiasis is the roundwormWuchereria bancrofti which is an example of a(n)___________________?
| | protozoan |
| | alga |
| | helminth |
| | none of these |
In an A-B exotoxin, which component binds to a receptor on thehost cell?
| | the A component |
| | the B component |
Which of these cell types are not immunologically specific?
| | B cell |
| | T helper cell |
| | natural killer (NK) cells |
| | all of these are correct |
Lysozymes _________. Â
| | destroy bacterial cell walls |
| | are found in tears |
| | are found perspiration |
| | all these are correct |
1. Innate immunity ______________.
| | is always slower than adaptive immunity in responding topathogens |
| | is nonspecific and present at birth |
| | involves a memory component |
| | involves T cells and B cells |
1. Regarding the complement system, which of these is a possibleresult?
| | cytolysis |
| | inflammation |
| | opsonization |
| | all these are correct |
Which of these is true about the structure of antibodies?
| | they have 2 heavy chains and 2 light chains |
| | they have constant regions (C) and variable regions (V) |
| | chains are linked together by disulfide bridges |
| | all of these are correct |
1. Which of the following is not one of Koch’s postulates?
| | same pathogen must be present in every case of the disease |
| | the pathogen must be isolated from the diseased host and grownin pure culture |
| | the isolated pathogen must cause the disease when it isinoculated into a healthy, susceptible laboratory animal |
| | all of these represent one of Koch’s postulates |
