Discuss the ethical concerns and political issues of the use of embryonic stem cells (ESC)
What will be an ideal response?
Despite the potential, ESC research is fraught with controversy because of the source of these cells: they are isolated from discarded embryos from abortion clinics and in vitro fertility ("test-tube baby") clinics. Opponents of using ESC are morally and ethically concerned because embryos are destroyed in the process of harvesting these cells. Proponents argue that these embryos were destined to be destroyed anyway (a decision already made by the parents of the embryos) and that these stem cells have great potential for alleviating human suffering. As such, ESC science has become inextricably linked with stem cell politics.
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Elderly people tend to have rougher skin and more brittle hair than younger people. What structure is associated with this problem?
A) merocrine glands B) sebaceous glands C) ceruminous glands D) apocrine glands E) eccrine glands
For gas exchange to be efficient, the respiratory membrane must be ________.
A) at least 3 micrometers thick B) 0.5 to 1 micrometer thick C) between 5 and 6 micrometers thick D) The thickness of the respiratory membrane is not important in the efficiency of gas exchange.
Phagocyte mobilization involves ________
A) monocytes as the most active phagocyte B) diapedesis, during which cells line up against the capillary wall C) mainly neutrophil and macrophage migration into inflamed areas D) margination, which is the process of white cell movement through the walls of capillaries into injured tissues
Which of the following structures helps to regulate body temperature?
A. Fenestrae B. Metarteriole C. Tunic D. Glomus