The term used to describe the practice of treating disease with drugs is called:

All of the following are hematopoietic growth factor receptor subgroups except:

a. Unique ligand-specific alpha chains with shared beta chains b. Unique ligand-specific alpha chains that share GP130 c. Unique ligand-specific alpha chains with shared gamma chains d. Unique ligand-specific alpha chains with shared zeta chains

Which of the following is a congenital defect characterized by failure of the posterior spi-nous processes of the vertebral column to close, usually in the lumbar spine?

a. Amyotrophic lateral dysplasia b. Myasthenia gravis c. Spina bifida d. Shingles