BIOS 255n DeVry Entire Course
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Cardiac output is the amount of blood ejected from the left or right ventricle in any given minute. Cardiac output must<br />
be maintained in order to keep sufficient blood flow through the capillaries. Identify the factors that directly affect blood<br />
flow in the circulatory system.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 3 Discussion 1<br />
Whole Blood (graded)<br />
Describe the composition, physical characteristics, and functions of whole blood. Explain why it is classified as a<br />
connective tissue.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 3 Discussion 2<br />
Liquid Connective Tissue (graded)<br />
Explain the similarities and differences among serum, lymph, and plasma. Each student should take one characteristic<br />
of the fluid, extracellular component of this connective tissue and explain how it relates to the other liquids.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 4 Discussion 1<br />
The Lymphatic System (graded)<br />
How do the various components of the lymphatic system operate? We have talked about many organ systems. In what<br />
ways are components of the lymphatic system involved in many other organ systems? Try to focus on one element of<br />
this system and provide an in-depth view of its contribution to our overall health.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 4 Discussion 2<br />
Nonspecific Immunity (graded)<br />
How do the various elements of the nonspecific immune system function in providing daily protection against a variety<br />
of pathogens? Each student should provide a unique aspect of the nonspecific immune system and educate the rest<br />
of us concerning its function and how effective (or ineffective) it is against one class of pathogens.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 5 Discussion 1<br />
B and T Cells (graded)<br />
Our knowledge and understanding of the various forms of lymphocytes continue to expand. Our initial discussion this<br />
week will be on the various forms of B and T cells — each of us should take one class of lymphocytes and explain it’s<br />
role in the adaptive immune process. As you comment on other students’ postings be sure to add additional insight into<br />
the mechanisms of the subclass of cell and its interactions with both components of the innate and other aspects of the<br />
adaptive immune system.<br />
<strong>BIOS</strong> <strong>255n</strong> Week 5 Discussion 2<br />
Vaccinations – Friend or Foe (graded)<br />
Recently a number of individuals have claimed that adjuvants, such as thymersol in vaccines, lead to the development<br />
of a variety of disorders, such as autism. Although these initial claims have not been substantiated and have since<br />
been withdrawn from the scientific literature, the concern continues today. How would you counsel parents concerning<br />
vaccination? Discuss the issue of herd immunity and the risks in our modern society related to refusal to provide<br />
vaccinations.