Biology is designed for multi-semester biology courses for science majors. It is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand. To meet the needs of today’s instructors and students, some content has been strategically condensed while maintaining the overall scope and coverage of traditional texts for this course. Instructors can customize the book, adapting it to the approach that works best in their classroom. Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand—and apply—key concepts.

By the end of this section, you will be able to:Describe the organization and functions of the sympathetic and parasympathetic nervous systemsDescribe the organization and function of the sensory-somatic nervous system

Parkinson's disease is a chronic, progressive, degenerative disease of the central nervous system that produces movement disorders and changes in executive functions, working memory, visuospatial functions, and internal control of attention in affected cognitive areas. It is named after James Parkinson (1755-1824), an English neurologist who studied the disease.