Explain why some syphilis patients may only experience the symptoms of primary syphilis, while other patients may progress all the way to tertiary syphilis
What will be an ideal response?
There are four stages of syphilis: primary, secondary, latent, and tertiary syphilis. At the end of the primary stage, or during the latent stage, the patient may cease to progress through the later stages of the disease for reasons that are still largely unknown. During latent syphilis, the progression of the disease may also stop due to antimicrobial drug use in developed countries. Additionally, if the disease is detected during the primary stage and treated, then no further progression will occur. However, many people do not know they are infected with Treponema pallidum because they do not notice the chancre that is the major sign of the primary stage; therefore, progression of the disease is usually assured in these cases.
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What is the main advantage of controlled burnings of forested areas? Controlled burnings _____
A) eliminate the possibility of forest fires B) clear forested areas for farmland C) prevent the overgrowth of the underbrush D) allow new species to form
The clinical microbiology laboratory can provide preliminary identification of microorganisms based on
A. growth or biochemical characteristics. B. immunologic techniques that detect microbial antigens. C. microscopic examination of specimens. D. All of the choices are correct.
Which of the following happens in the first stage of the Calvin cycle?
a. RuBP is generated. b. An organic molecule is reduced. c. RuBisCO incorporates carbon dioxide into an organic molecule. d. RuBP incorporates carbon dioxide into an organic molecule.
The main problem for sufferers of cystic fibrosis is
A. abnormal hemoglobin. D. missing DNA repair enzymes. B. elevated levels of cholesterol. E. formation of cysts in kidneys. C. mucus blocking ducts of glands.