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1-Important factor\s which may govern diffusion of drugs across cell membranes :
A- pKa value of the drug.
B- pH of the medium.
C- lipid solubility of the drug.
D- all of the above.
2-“the maximal effect produced by the drug” is the definition of :
A-potency
B- affinity
C- efficacy
D- bioavailability
3-what the body does to the drug is called :
A- pharmacodynamics
B- pharmacology
C- pharmacokinetics
4-the second messenger of beta receptors is :
A- Gs
B- Gi
C-guanylyl cyclase
D- Gq
5- the following may be used to assess drug efficacy in the graded dose – response curve :
A- slope of the curve
B- ED50
c- Emax
D- A&C
