Histamine is produced by_______ specifically to promote acute inflammation.

a) Neutrophils
b) Plasma Cells
c) T-helper Cells
d) Mast Cells


Answer: d) Mast Cells

Biology & Microbiology

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Several butterfly species that are edible to birds have very similar color patterns to the generally inedible monarch butterfly. This is best described as an example of what?

A. Müllerian mimicry B. Batesian mimicry C. crypsis D. intimidation E. aposematic coloration

Biology & Microbiology

These molecules can directly convert extracellular signals into intracellular signals.

A. G proteins B. Adapter proteins C. Scaffolds D. Second messengers E. Membrane receptors

Biology & Microbiology

Which of the following disorders is described as follows: damage to motor nerves innervating skeletal muscle; skeletal muscles weaken; death usually results within five years of diagnosis?

A) amytrophic lateral sclerosis B) pleurisy C) cystic fibrosis D) emphysema E) botulism

Biology & Microbiology

Which is a characteristic of a good hypothesis?

a. It is falsifiable. b. It is a statement of fact. c. It can only be tested once. d. It can be proven to be true. e. It represents important conclusions.

Biology & Microbiology