The reference pressure for measurement of respiratory pressures is ____________________ pressure

A new synthetic narcotic has been developed by the pharmaceutical industry. This drug, called Drug A, has three times the efficacy of an existing synthetic narcotic, Drug B. However, Drug B has twice the affinity for opiate receptor sites in the body as Drug A. Which drug will have the greater effect when administered at the same dosage?

A) Drug A B) Drug B C) Identical effects when administered at the same dosage D) Cannot be determined by the information given

Which type of solid lumber has a nominal thickness of 5 inches (125 mm) or more?

A. Board B. Timber C. Lumber D. Dimension lumber