Answer to Question 1
ANS: B
Some bacteria secrete toxins that harm individuals. For instance, specific bacterial toxins cause the symptoms of tetanus or diphtheria. This is not true of malaria, smallpox, or hepatitis.
Answer to Question 2
ANS: A
Some bacteria, such as Neisseria gonorrhoeae that causes gonorrhea, must attach to specific sites on urogenital epithelial cells. Antibodies may protect the host by covering sites on the microor-ganism that are needed for attachment, thereby preventing infection. Neither a vaccination, the protection of platelets, nor the release of IgE was relevant to the client's ability to avoid con-tracting this disease.