A famed psychologist claims that motivated behaviors result from an effort to reduce tension caused by bodily needs such as hunger or thirst. This psychologist's philosophy most closely matches ________ theory

Which of the following best represents the notion that social identities are relational and comparative?

A) Medical students are perceived as doctors by patients in the hospital but as children by their parents. B) Medical students are perceived as doctors by patients in the hospital but as students by their professors in the classroom. C) Medical students are perceived as doctors by patients in the hospital but as students by themselves. D) Medical students are perceived as students by patients in the hospital and as students by their professors in the classroom. E) Medical students are perceived as students by patients in the hospital before they graduate, but as doctors by the same patients after they have graduated.

Near the peak of the action potential, which type of ion begins to leave the cell?

a. sodium b. potassium c. calcium d. magnesium