Viruses such as Epstein-Barr virus, cytomegalovirus, and HIV are capable of suppressing the immune system by
A. binding antibodies but avoiding an immune response.
B. infecting lymphocytes or phagocytic cells.
C. production of cytokine antagonists.
D. wrapping progeny viral particles in the host-cell plasma membrane.
E. Both B and C.
E
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Answer the following statements true (T) or false (F)
1. Dental caries may lead to tooth loss. 2. Esophageal varies may rupture and cause serious bleeding. 3. Hepatitis is usually caused by a bacterial infection. 4. Ileus is a problem resulting from an intestinal blockage. 5. In an inguinal hernia, the intestine protrudes through the diaphragm.
Severe shock can be followed by acute lung injury/acute respiratory distress syndrome (ALI/ARDS) characterized by:
A) Hyperventilation B) Excessive surfactant C) Hyperinflated alveolar sacs D) Ventilation–perfusion mismatch
The greenhouse effect results from the trapping of cold air in the Earth's lower atmosphere by greenhouse gases
Indicate whether the statement is true or false
The Occupational Stress Evaluation Grid includes all of the following contexts EXCEPT the:
A. biological context. B. psycho-social context. C. interpersonal context. D. psychological context.