The neurotransmitter produced in the substantia nigra is:

What dosage form consists of a very fine liquid or solid particles mixed in a vehicle, then packed with gas and pressure that forces the medication directly into the respiratory system?

A) Spray B) Inhalant C) Aerosol D) Liniment

Which of the following are critical to structural integrity, but have a greater possibility of buckling than other materials?

A. Steel arches B. Rigid frames C. Steel columns D. Steel suspension systems