Allergy is a ________ response to __________ antigens

a. hypersensitive; environmental
b. hyposensitive; cellular
c. normal level; microbial
d. mixed; protein
e. mixed; microbial


A

Biology & Microbiology

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The kidneys secrete erythropoietin to stimulate red blood cell production by bone marrow.

a. true b. false

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When sperm enter the epididymis, they ________

A) are mature B) are incapable of moving on their own C) are ready to fertilize an egg D) come from the vas deferens

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Which of the following would prevent an organism from becoming part of the fossil record when it dies?

A) It is fully decomposed by bacteria and fungi. B) It is buried in fine sediments at the bottom of a lake. C) It gets trapped in sap. D) It is frozen in ice.

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The parietal cells of the stomach are responsible for producing

A) mucus. B) pepsin. C) hydrochloric acid. D) bile.

Biology & Microbiology