Which of the following is a characteristic of the human ...

[chandani]

Which of the following is a characteristic of the human immunodeficiency virus (HIV), which causes AIDS?
 
  a. HIV only infects B cells.
  b. HIV is a retrovirus.
  c. Infection does not require a host cell re-ceptor.
  d. After infection, cell death is immediate.

Question 2

What common symptom should be assessed in individuals with immunodeficiency?
 
  a. Anemia
  b. Recurrent infections
  c. Hypersensitivity
  d. Autoantibody production

[InfiniteSteez]

Answer to Question 1

ANS: B
AIDS is an acquired dysfunction of the immune system caused by a retrovirus (HIV) that infects and destroys CD4+ lymphocytes (T-helper cells). HIV infection begins when a virion binds to CD4, not a B cell. Infection requires a host cell receptor. The cell remains dormant but does not die.

Answer to Question 2

ANS: B
The clinical hallmark of immunodeficiency is a propensity to unusual or recurrent severe infec-tions. The type of infection usually reflects the immune system defect. Neither anemia, autoanti-body production, nor hypersensitivity is a manifestation of immunodeficiency.

[chandani]

Excellent

[miss_1456@hotmail.com]

Gracias!