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Central Nervous System CNS

Brain and Spinal cord

Peripheral Nervous System PNS

Nerves outside the brain / spinal cord

Sensory Nerves

AFFERENT..from BODY to BRAIN

Somatic Nerves

EFFERENT..from BRAIN to BODY..MOTOR nerves..controls skeletal muscles..VOLUNTARY movement

3 devisions of the Peripheral nervous system

Sensory..Somatic and Autonomic

Autonomic

INVOLUNTARY..includes parasympathetic and sympatheic

parasympathetic branch

REST and DIGEST..Digestion, urination, salivation Daily body upkeep and maintenance

sympathetic branch

FIGHT or FLIGHT..Alert system for stressful situation..Ex. airplane crach..being jumped

2 chemical neurotransmitters

ACh Acetacholine and NE norepinephrine

Parasympathetic AND sympathetic 1st synapse

Nicotinic receptor

Parasympathetic system 2nd synapse

Muscarinic receptor

sympathetic system 2nd synapse

adrenergic receptor(alpha or beta)

Cholinergic receptors

Muscarinic and Nicotinic

Adrenergic receptors

Alpha and Beta

SYMPATHETIC PRE AND POST GANGLIONIC SITES

PRE(Ach) POST(NE)..Pre receptors(NICOTINIC) Post receptors(ADRENERGIC>>ALPHA OR BETA)

Parasympathetic PRE AND POST GANGLIONIC SITES

Pre and Post(Ach)..Pre receptors(NICOTINIC) Post receptors(Muscarinic)

Beta 2

causes smooth muscle to dialate..will have an increase in HR because receptors not specfic, and HR is part of Beta 1

Sympathetic

Increase HR and Dialation

Parasympathetic

Decrease HR and Constriction

Cholinergic/parasympathomimetic

Acts on AcH, mimics parasympathetic system, Decrease in HR, and Bronchoconstriction

Anticholinergic/Parasympatholytic

Blocking para symp. receptors..Increase in HR Bronchodialation

Adronergic/sympathomimetic

Acts on NE..Heart rate up (B1), Bronchodialation (B2)

Antiadronergic/sympatholytic

Blocks effect of symp. system..Lowers HR, causes bronchoconstriction

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