[Solved] An experimenter finds that a certain male subject always has an increased heartbeat when he sees a picture of a nude female.The experimenter sounds a buzzer and then presents such a picture.The experimenter repeats this procedure until the man responds with an increased heartbeat to the sound of the buzzer alone.In this situation the UNCONDITIONED response is the _______. A)increased heartbeat B)female's picture C)sounds of the buzzer D)viewing of the picture Average Total Cost Curve: A graphical representation showing the average total cost of producing different quantities of output. Purely Competitive Firm: A company that operates in a market where there are many buyers and sellers, the products are homogeneous, and there are no barriers to entering or exiting the market. Economic Profit: The financial delta observed when a business's total outgoings, including every form of cost, are removed from its total intake. MR = MC Rule: An economic principle stating that profit maximization occurs when a firm's marginal revenue equals its marginal cost.