BLG 101 lec 14
2 forms of autonomic nervous system - answerParasympathetic divison: promotes
maintance of function
Symapthetic divison: mobilizes body during activty
Dual innervation - answerMost visceral organs are served by both division but these
divisions capsule opposite effects
Role of parasympathetic division - answer- directs digestion
- diuretics
- defecation
"Rest and digest" system
- BP, HR and respiratory rates are low
- gastrointestinal tract activity is high
- pupils constrict, lenses accommodated for close vision
Role of the sympathetic division - answer"Fight or flight" system
- exercise, excitement, emergency, embarrassment activates system
- increased HR, dry mouth; cold, sweaty; dilated pupils
- shunts blood to skeletal muscles and heart
- dilates bronchioles
- causes liver to release glucose
Parasympathetic fiber origin - answerCraniosacral
sympathetic fibre origin - answerThoracolumbar
Neurotransmitters - answerMost postganglionic fibers release norepinephrine,
postganlionic fibers serving sweat glands release ACh. Neurotransmitters activity is
augmented by release of adrenal medullary hormones
Sympathetic NS -> adrenal medulla - answerPowerhouse of hormones
Cholinergic receptors - answer1. Nicotine receptors -> post ganglionic neuron
2 forms of autonomic nervous system - answerParasympathetic divison: promotes
maintance of function
Symapthetic divison: mobilizes body during activty
Dual innervation - answerMost visceral organs are served by both division but these
divisions capsule opposite effects
Role of parasympathetic division - answer- directs digestion
- diuretics
- defecation
"Rest and digest" system
- BP, HR and respiratory rates are low
- gastrointestinal tract activity is high
- pupils constrict, lenses accommodated for close vision
Role of the sympathetic division - answer"Fight or flight" system
- exercise, excitement, emergency, embarrassment activates system
- increased HR, dry mouth; cold, sweaty; dilated pupils
- shunts blood to skeletal muscles and heart
- dilates bronchioles
- causes liver to release glucose
Parasympathetic fiber origin - answerCraniosacral
sympathetic fibre origin - answerThoracolumbar
Neurotransmitters - answerMost postganglionic fibers release norepinephrine,
postganlionic fibers serving sweat glands release ACh. Neurotransmitters activity is
augmented by release of adrenal medullary hormones
Sympathetic NS -> adrenal medulla - answerPowerhouse of hormones
Cholinergic receptors - answer1. Nicotine receptors -> post ganglionic neuron
