Neuro physiology autonomic nervous system part 1

visceral nervous system

autonomic nervous system

preganglionic component of the ANS

CNC

Postganglionic component of the ANS

PNS

The ANS has a chain of two motor neurons called the

Preganglionic neuron and postganglionic neuron

_____ is slower due to thinly or unmyelinated axons

Conduction

The ____ is part of the peripheral nervous system and central nervous system

ANS

The ANS functions ____

Involuntary

I'd emergencies that cause stress we typically use the _____ nervous system

Sympathetic

When nothing is going on then we are using the _____ nervous system

Parasympathetic

If the somatic nerves to a skeletal muscle are severed then the muscles

Do not function

If the autonomic nerves to cardiac or smooth muscle are severed, the muscle exhibits

exaggerated responses (denervation hypersensitivity)

Within 3 to 5 seconds the ANS can increase ____ ____ to twice than normal

Heart rate

Functions of the parasympathetic nervous system

Heart rate, gastric secretions, bladder and bowel, vision and bronchial smooth muscle

Cranial flow of the parasympathetic nerves

Oculomotor nerve(III), facial nerve(VII), glossopharyngeal(IX), vagus nerve(X)

The ____ nerve is the major preganglionic parasympathetic nerve supply to the thorax and abdomen

Vagus

sacral outflow of parasympathetic division

S2-S4 via pelvic splanchnics

sacral outflow of parasympathetic division extends to

Hindgut, pelvic viscera and external genitalia

The parasympathetic nerves innervated the _____ region

Cervicothoracic

Urinary bladder parasympathetic stimulation causes

•contraction of the bladder wall

•relaxation of its sphincter

•micturition (urination)

Sympathetic pathway has ____ for neurotransmitters and ____ for receptors

Norepinephrine; adrenic receptor

Parasympathetic pathway has _____ for neurotransmitter's and _____ for reseptors

Acetylcholine; muscarinic receptors

Main functions of the sympathetic nervous system

-regulation of cardiovascular system

-regulation of body temperature

-induces piloerection and sweat secretion

-Implementation of "fight-or-flight" reaction releases Epinephrine into the blood stream

sympathetic nervous system remains in the _____ region

Thoracolumbar (T1-L2ish)

T1-T3 innervate

Head and salivary glands

T4-T6 innervate

Heart, lungs and esophagus

T7-T9 innervate

Stomach, liver, gallbladder and pancreas

T10-T11 innervate

Appendix and colon

T12-L2ish innervates

Rectum, bladder,uterus

T1-T2 innervate

The eye

T8-T10 innervate

Small intestine

T11-L1 innervate

Kidney

T10-L1 innervate

Suprarenal gland

paravertebral ganglia are located

each side of the spinal column United by preganglionics into sympathetic trunk

Preganglionic neurons are

Thoracolumbar(T1-L2ish)

postgnaglionic neurons are in

Cervical to coccyx