In most cases, neurons communicate at synapses by transmitting an electrical charge

The chemical senses are ____ and ______

Fill in the blank(s) with the appropriate word(s).

Much of the social science research that shaped developmental theories in the past has been done on a narrow sample of people. Which set of descriptors best identifies the narrow sampling?

A. Western, diverse levels of education and diverse economic strata B. World-wide, culturally diverse, young, and poorly educated C. World-wide, well-educated, wealthy, and industrialized D. Western, educated, industrialized, rich, and democratic