Question

unit 7: understanding diseases & disorders

1. which defense is indicated by redness, heat, swelling, and pain? (ch 18)

a. inflammation
b. phagocytosis
c. fever
d. b cell production

1. which of the following statement is true about vaccines? (ch 18)

a. vaccines contain live pathogens
b. vaccines can cause infections
c. vaccines provoke an immune response in the body
d. vaccines are also called antibiotics

1. a disease that spreads too much of the world is called a(n): (ch 18)

a. pandemic
b. endemic
c. epidemic
d. emerging infectious disease

1. which sti is known as a silent disease? (ch 19)

a. chlamydia
b. syphilis
c. gonorrhea
d. herpes

1. which of the following sti is caused by a protozoan? (ch 19)

a. herpes
b. gonorrhea
c. hpv
d. trichomoniasis

1. hiv is found in which bodily fluid? (ch 19)

a. saliva
b. tears
c. sweat
d. blood

Explanation:

1. Inflammation is characterized by redness (rubor), heat (calor), swelling (tumor), and pain (dolor). Phagocytosis is the process of cells engulfing pathogens. Fever is an elevated body temperature. B - cell production is related to antibody - producing cells in the immune system.
2. Vaccines contain inactivated or weakened pathogens (not live in most cases), they do not cause infections (as the pathogens are not virulent enough to cause full - blown infection in most cases), and they are not antibiotics. Antibiotics kill bacteria, while vaccines work on the immune system. Vaccines provoke an immune response by presenting antigens to the immune system.
3. A pandemic is a disease that spreads over a large area, often worldwide. An endemic disease is constantly present in a particular area. An epidemic is a disease that spreads rapidly in a particular region. An emerging infectious disease is a new or re - emerging disease.
4. Chlamydia is often called a silent disease because many infected people have no symptoms. Syphilis, gonorrhea, and herpes usually have more noticeable symptoms in many cases.
5. Trichomoniasis is caused by the protozoan Trichomonas vaginalis. Herpes is caused by a virus, gonorrhea by a bacterium, and HPV (Human Papillomavirus) by a virus.
6. HIV is found in blood (as well as semen, vaginal fluids, breast milk etc.). The virus load in saliva, tears, and sweat is usually too low to cause infection.

Answer:

1. a. Inflammation
2. c. Vaccines provoke an immune response in the body
3. a. Pandemic
4. a. Chlamydia
5. d. Trichomoniasis
6. d. Blood