Describe cellular-mediated immunity. What are some of the cells involved in this immune strategy?
What will be an ideal response?
The human immune system employs two major strategies, which we can call the one-two punch of cellular immunity and humoral immunity. The first punch, cellular-mediated immunity involves the NK cells, the granulocytes (e.g., neutrophils), the macrophages, and T cells quickly localizing to the site of injury or infection and in the process of inflammation either engulfing (phagocytosing—the Pac Man strategy) damaged endogenous cells along with invading exogenous antigens or releasing toxic substances (e.g., poison dart strategy) to harm them. This type of immunity is governed by a certain type of T cell known as a Type 1 T helper (Th1) cell.
Macrophages play a major role in triggering the immune system by releasing communication molecules called cytokines and stimulating the production of T-helper cells. The Type 1 T helper (Th1) cells then partner with the macrophages to maximize their killing efficiency. The Th1 cells also produce cytokines that activate the NK cells and the cytotoxic T cells.
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A. size B. shape C. brightness D. color
Gallup's research revealed that when apes were raised in isolation, they were unable to recognize themselves in the mirror. This research provides support for
a. the concept of the looking-glass self. b. self-perception theory. c. the non-social origins of the self-concept. d. the idea that humans are the only animals capable of self-recognition.
When Milgram replicated his original study in 1974, but did so in a dingy storefront, the percentage of people who complied with the experimenter
a. increased from 45% to 68%. c. decreased from 65% to 48%. b. remained the same. d. decreased from 95% to 6%.
One way feminine cultures differ from masculine cultures is feminine cultures:
a. place a greater emphasis on wealth. b. have higher job stress. c. place more emphasis on job status. d. place more emphasis on quality of life.