Selective attention is the diversion and focus of once attention on a particular important stimulus (visual, auditory) while oblivious of other stimuli in the same environment.Thus less energy is diverted to irrelevant stimuli and all energy to the most relevant. It can be conscious e.g when decides to focus on his phone while discarding TV sets or radio set in the same room. or Involuntary when bumps to brightly colored sport car in a slum.
A piratical example of this auditory form of attention is the Corktail -party effects in the question when an individual unconsciously glued to the direction of sound of the name in a rowdy room, while obliviuos of other sounds in the same room or making mobile calls while driving a car. In all this cases maximum energy is directed for processing information for auditory effects while irrelevant stimuli are neglected.
The answer to this anatomy question is simple. The one that sets the pace of the heart rate is called the sinoatrial node, a group of cells located <span>in the wall of the </span>right atrium<span> of the </span>heart<span>.</span>
