Why does the body often respond to an infection with a fever?
What will be an ideal response?
When macrophages encounter bacteria, they send out chemical messages that are received by helper T cells but are also received by the brain. The brain can respond by increasing the body's basal temperature, a response we refer to as a fever. Bacteria do not do well at higher temperatures, so this is another adaptation the body has so it can slow down the progress of bacteria until the immune response can catch up.
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Methylene blue
(a) is used to kill cells that are moving too quickly to observe. (b) detoxifies cells so they are safe to handle. (c) is used as food for Physarum cells. (d) is a biological stain used to increase contrast of transparent cells.
Which of the following components of the
dermis is incorrectly matched with its usual function? a. blood vessels; nutrient supply b. sweat glands; hormone secretion c. oil glands; lubrication of hair and skin d. hairs; insulation e. receptors; pain
The major product of the Calvin Cycle is
a. rubisco b. oxaloacetate c. RuBP d. pyruvate e. glyceraldehyde - 3- phosphate
In the 2009 H1N1 “swine flu” pandemic, the influenza virus underwent a(n) ________, which made it especially deadly. Mortality of individuals ________ than 50 years of age was MOST common
a. antigenic drift / older b. antigenic drift / younger c. reassortment / older d. reassortment / younger