Which properties are common to both the cell-mediated and humoral immune systems?
Standard Text: Select all that apply.
1. Recognition of common pathogenic features in bacterial cell walls
2. Both depend on the response of helper T cells.
3. Memory: the ability to mount a more rapid attack on a foreign antigen because of previous exposure
4. Specificity: the ability to react with molecules bearing a specific marker
5. Both react in the same way regardless of the nature of the offending agent.
Correct Answer: 3,4
Rationale 1: The humoral and cell-mediated immune systems recognize specific antigens, not common pathogen features.
Rationale 2: The cell-mediated immune response involves helper T cells. The humoral immune system involves B cells.
Rationale 3: Both the humoral and cell-mediated immune systems form memory cells so that they can respond more quickly to subsequent infections.
Rationale 4: Both systems are specific; they attack specific antigens.
Rationale 5: The humoral and cell-mediated immune systems adapt to individual antigens and threats.
Global Rationale: The humoral and cell-mediated immune systems are part of the specific body defenses. Specificity, systemic response, and memory are characteristic of specific body defenses. The humoral immune response is mediated by B lymphocytes and includes secretion of antibodies. The cell-mediated immune response is mediated by T lymphocytes and includes secretion of cytokines. The humoral and cell-mediated immune systems recognize specific antigens, not common pathogen features. The cell-mediated immune response involves helper T cells. The humoral immune system involves B cells. The humoral and cell-mediated immune systems adapt to individual antigens and threats.
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