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sts almost never used economic theory and the concepts of marginal benefits and marginal costs to make their decisions in this sector. Today, when economic theories are applied, agriculturists consider how the proposed new technologies and all the associated risks, for example, would impact the profitability of using the new technologies. To conclude, it must be said that economic theory can be applied in any sector, and especially in areas where one wishes to analyze one’s profits against one’s investments. Today, more and more people have started to apply these practical theories within their organizations and even otherwise, and thereafter, enjoying the benefits of such analyses.
 
A phobia is an irrational, intense, persistent fear of certain situations, objects, activities, or persons. Phobia is also used in a non-medical sense for aversions of all sorts. Fear is an adaptive human response to danger. It serves a protective purpose, activating the “fight-or-fight” response of the sympathetic nervous system. When faced with danger, our sympathetic nervous system produces adrenaline. This excess adrenaline prepares us to fight or to flee the physical threat. The fight-or-flight response includes an increase in heart rate and blood flow to our large muscles, better enabling us to react to the emergency. Blood sugar also increases, providing us with more energy. With our bodies and minds alert and ready for action, we are able to respond quickly and protect ourselves. Phobias are more often than not linked to the amygdala, an area of the brain located behind the pituitary gland in the limbic system.
 
The amygdala secretes hormones that control fear and aggression, and aids in the interpretation of this emotion in the facial expressions of others. Most psychologists and psychiatrists classify most phobias into three categories: Social phobias-fears involving other people or social situations; Specific phobias-fear of a single specific panic trigger; Agoraphobia-a generalized fear of leaving home or a small familiar ‘safe’ area. 2 Common phobia symptoms and sensations include shortness of breath, palpitations, pounding heart or accelerated heart rate, chest pain or discomfort, trembling, feeling of choking, sweating nausea or stomach distress, fear of dying, numbness and fear of fainting. 3 Arachnophobia (from Greek arachne, “spider” and phobia “fear”) is a specific phobia, an abnormal fear of spiders and sometimes other arachnids, such as scorpions and harvestmen. It is among the most common of all phobias. The reactions of arachnophobics often seem irrational to others (and sometimes to the sufferers themselves). People with arachnophobia tend to feel uneasy in any area they believe could harbor spiders or that has visible signs of their presence, such as webs. Arachnophobia is, in many cases, the result of a traumatizing encounter with spiders in one’s early childhood, though the experience may not be remembered. One view, especially held in evolutionary Psychology, is that the presence of venomous spiders led to the evolution of an innate fear of spiders or made acquisition of a fear of spiders especially easy. Like all traits, there is variability in the intensity of fears of spiders, and those with more intense fears are classified as phobic.
 
The most frequently used form of therapy for the treatment of specific phobias is a type of cognitive behavioral therapy (CBT) called sys本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。