During an asthma attack, allergens trigger the release of histamine, which causes severe constriction of the __________________.
A. pleural cavities
B. trachea
C. rib cage
D. bronchi
E. larynx
D. bronchi
You might also like to view...
Vernalization can result in the remodeling of chromatin in some species, which means:
A. plants are able to "know" if they have experienced winter. B. plants can pass on acquired changes to their offspring. C. plants may grow new cells, and those cells will not "know" they have experienced winter. D. products of mitosis will not "remember" winter. E. products of meiosis will "remember" winter.
Earth is the warmest it has been for ____ years
a. 12 b. 120 c. 1200 d. 12, 000 e. 12, 000, 000
Saturated fats are saturated with ________
A) carbon B) nitrogen C) hydrogen D) oxygen
The reactant in an enzyme-catalyzed reaction is the
A) product. B) allosteric inhibitor. C) activation energy. D) active site. E) substrate.