Because of the chemical nature of impulse and the axon-dendrite structure. Because of the chemical nature of impulse and the axon-dendrite structure. http://www.biologymad.com/nervoussystem/nerveimpulses.htm (Best technical explanation and excellent graphics and animations)
Newborns may sneeze, and this is typically attributed to the irritation of their nasal passages. The most common irritants, explains Dr. Iannelli, are smoke (and simply smoking outside is not enough), animal dander from pets in the house, dust mites, and mold.
Toddler hives are caused by your toddler's immune system sensing an allergen being present. The childâs immune system sends out histamine into the blood stream to combat the allergen and remove it from the body.oddler hives can also have other symptoms, depending on what triggered the outbreak. If your toddler has an infection that is causing the hives, then your child may have a runny nose, cough, slight fever or a sore throat.