When a person has an autoimmune disorder, antibodies are secreted that bind to:
What will be an ideal response?
self antigens.
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Answer the following statements true (T) or false (F)
1. The exoenzyme that causes toxic shock syndrome is called erythrogenic toxin. 2. The neurotoxins produced by Clostridium botulinum and Clostridium tetani cause a spastic, rigid type of paralysis. 3. Although most people use the terms “infection” and “infectious disease” synonymously, microbiologists define infection as colonization by a pathogen. 4. Avirulent strains do not cause disease. 5. It is thought that the waxes in the cell walls of Mycobacterium tuberculosis protect this pathogen from digestion within phagocytes.
An organ must contain at least:
A. two different tissue types. B. two different cell types. C. all four of the tissue types. D. connective tissue. E. two different muscle types.
_____ are densely staining, highly compacted, and transcriptionally inactive regions of chromatin
a. Homochromatin b. Heterochromatin c. Histone-dependent chromatin d. Primary chromatin e. Euchromatin
The circulatory pathways of vertebrates are pictured. Briefly differentiate between the pathways and identify the pathways found in: •amphibians and reptiles •fishes •some reptiles, birds and mammals. Pathway APathway BPathway C 
What will be an ideal response?