Alexander Graham Bell studied the human ear and noticed how sounds were transmitted when a membrane (the eardrum) vibrated. He applied this knowledge to the development of the telephone, using a similar process of vibration of a membrane. Which cognitive process did Bell demonstrate?

Hebb argued that the nervous system is organized into special " __________ " that represent mental activity.

Fill in the blank(s) with correct word.

It is time for another game of Jeopardy and the category is "Causes of Death." If the revealed answer is, "The number one cause of death in the United States," what will you say just before the buzzer sounds?

a) "What is cancer?" b) "What are accidents?" c) "What is drug abuse?" d) "What is heart disease?"