When a person has strong emotions, many of his bodily changes occur. Ex: The physical components of fear include in increased heartbeat, a rise in the blood pressure, an increase in the adrenaline secretions, an elevated blood sugars level, a slowing of the digestion, and a dilation of the pupils.
The major of physiologic triggers of adrenaline is release center upon the stresses, such as the physical threat, excitement, noise and bright lights, and high or the low ambient temperature. All of these are stimuli are processed under the central nervous system.
Secretion of the adrenaline is controlled by the presympathetic neurons in the rostroventrolateral of the medulla, which are, in turn of under the control of central and/or peripheral the glucose‐in sensing neurons.
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