Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. stimulating components of the immune system through the release of cytokines.
B. stimulating the production of specific antibodies.
C. blocking or reducing the inflammation response in mucous membranes.
D. recruiting macrophages to the nasal epithelium.
E. lysing virus-infected cells and preventing further propagation of the pathogen.
Answer: C
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This process is common to all living cells:
A. Glycolysis B. Alcohol fermentation C. The Krebs cycle D. Electron transport chain reactions E. Pyruvate oxidation
What cellular process is involved in the release of histamine or cytokine?
A. receptor-mediated endocytosis B. pinocytosis C. exocytosis D. transcytosis
Global deforestation remains a major concern as huge tracts of rainforest are cut down each day. How does the removal of such large numbers of trees from the world's forests affect the concentration of carbon dioxide in the atmosphere?
A. The concentration of carbon dioxide increases, which has a warming effect on the climate. B. The concentration of carbon dioxide increases, which has a cooling effect on the climate. C. The concentration of carbon dioxide decreases, which has a warming effect on the climate. D. The concentration of carbon dioxide decreases, which has a cooling effect on the climate. E. The concentration of carbon dioxide remains unchanged, with no effect on the climate.
Water stabilizes body temperature and dissolves many substances because
a. it evaporates easily. b. its molecules are covalent. c. its molecules are ionic. d. it contains hydrogen bonds. e. it is free of minerals