Increasing stimulation of the parasympathetic nervous system decreases heart rate and blood pressure as well as the size of the pupil. At the same time, it increases digestion, urination, defecation and sexual arousal. T... More »

Turmeric helps normalize skin tone, according to About.com. Applied topically, it treats acne and reduces scarring. As an anti-oxidant, turmeric combats free radicals that contribute to the premature aging of the skin. More »

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Neuroscience for Kids states that smoking affects the nervous system by causing an increase in blood pressure, heart rate and respiration as well as constriction of arteries and stimulation of the central nervous system.... More »

Adrenaline, also known as epinephrine, primarily boosts the heart rate, raises blood pressure, expands the lung air passages and dilates the pupil in the eye. It acts on various kinds of cells and generates numerous acti... More »

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Vasovagal syncope, the medical term for fainting due to suppression of the functions of the vagus nerve, occurs when this essential part of the nervous system that controls the heart rate and blood pressure malfunctions,... More »

Adrenaline, a natural stimulant created in the kidney's adrenal gland, travels through the bloodstream and controls functions of the autonomous nervous system, including the secretion of saliva and sweat, heart rate and ... More »

Respiratory drive, or respiratory control, refers to the process by which detected changes in the body's pH and PCO2 levels are responded to by the central nervous system's corrective stimulation of the rhythm, effort an... More »