The Tibetan Terrier is a medium-size breed of dog originated in Tibet. Despite its name, it is not a member of the terrier group. The breed was given its name by European travellers who first encountered it, because of its resemblance to known terrier breeds.he Tibetan Terrier is a medium-size breed of dog originated in Tibet. Despite its name, it is not a member of the terrier group. The breed was given its name by European travellers who first encountered it, because of its resemblance to known terrier breeds.
The parasympathetic nervous system (PNS) controls homeostasis and the body at rest and is responsible for the body's rest and digest function. The sympathetic nervous system (SNS) controls the body's responses to a perceived threat and is responsible for the fight or flight response.he sympathetic nervous system (SNS) is one of two main divisions of the autonomic nervous system (ANS). Its general action is to mobilize the body's fight-or-flight response.
Parasympathetic & sympathetic systems often have antagonistic effects in each organ. Sweat glands and most vascular smooth muscles have only sympathetic innervation. Ciliary muscle of the eye has only parasympathetic innervation. Bronchial smooth muscle Only parasympathetic innervation: Constriction. Smooth muscle sensitive to circulating adrenaline: Dilation. Salivary glands: Systems produce similar, rather than opposite, effects.