The structure designated by the letter "A" in
the above figure is called
a. pyloric sphincter.
b. esophagus.
c. mucosa.
d. duodenum.
e. none of these.
B
Biology & Microbiology
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Which of the following is NOT associated with a higher cancer risk?
a. hormone therapy b. safe sex c. smoking d. use of alcohol e. exposure to certain hazardous chemicals in the workplace
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________ are a group of cytokines produced by some eukaryotic cells in response to a viral infection.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology