A cross-table lateromedial knee projection demonstrates the medial femoral condyle distal to the lateral femoral condyle. To obtain an optimal projection,
a. rotate the x-ray tube column to align the central ray more cephalically.
b. adjust the central ray angulation posteriorly.
c. adduct the patient's leg.
d. internally rotate the patient's leg.
C
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Why is lipid diffusion an important mechanism for drug absorption?
a. Many epithelial membranes must be crossed if a drug is to distribute in the body and reach its target organ. b. Epithelial cells do not have lipid membranes, so a drug must be water-soluble to diffuse across such a membrane. c. It is directly related to the proportion of a drug that reaches the systemic circulation. d. Lipid diffusion has no importance in drug absorption because the body has very few epithelial membranes drugs must cross.
This term is used to describe when two drugs act on the same receptors and the combined effect is the simple linear sum of the effects of the two drugs, up to a maximal effect
a. Potency b. Hypersensitivity c. Potentiation d. Additivity