30. Which is the best definition of homeostasis? a. Means that conditions never change.
b. The tendency to maintain a relatively stable equilibrium
c. The tendency to disrupt the normal conditions of a cell
d. Results when concentrations inside the cell are different than the outside of the cell.

the correct answer is anaphylaxis.

anaphylaxis is a condition caused by insect bites, foods, medications, manifested by tongue swelling, shortness of breath, vomiting, low blood pressure. it sometimes may occur without an obvious reason. it is treated with epinephrine injection.other tretments include antihistamines and steroids,