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.
1 The sympathetic division of the autonomic system activates the body to fight or flight through adrenergic effects. 2  The parasympathetic division often exerts antagonistic actions through cholinergic effects. 3  All preganglionic autonomic nerve fibers are cholinergic (use ACh as a neurotransmitter). Preganglionic parasympathetic fibers originate in the brain and in the spinal cord. 2  Preganglionic parasympathetic fibers contribute to cranial nerves III, VII, IX, and X. 3  The long preganglionic fibers of the vagus (X) nerve synapse in terminal ganglia located next to or within the innervated organ.