Pharmaceutical companies have developed antihistamines, which are chemicals that disrupt the process described above. Antihistamines are designed to bind to histamine receptors. In order to accomplish this, antihistamines must be designed to A.
bind with certain types of white blood cells.
B.
mimic the shape of histamine receptors.
C.
bind with certain portions of histamine molecules.
D.
mimic the shape of histamine molecules.

How are elements arranged in a periodic table

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.