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37 Cards in this Set

  • Front
  • Back
Arterioles
Predominant tone
effect of gangionic blockage
- Sympathetic (adrenergic)
- Vasodilation; increased peripheral blood flow; hypotension
Veins
Predominant tone
effect of gangionic blockage
- Sympathetic (adrenergic
- Dilation; peripheral pooling of blood; decreased venous return; decreased cardiac output
heart
Predominant tone
effect of gangionic blockage
- Parasympathetic (cholinergic)
- Tachycardia
iris
Predominant tone
effect of gangionic blockage
- Parasympathetic (cholinergic)
- Mydriasis
ciliary muscles
Predominant tone
effect of gangionic blockage
- Parasymapthetic (cholinergic)
- Cycloplegia—focus to far vision
GI
Predominant tone
effect of gangionic blockage
- Parasymapthetic (cholinergic)
- Reduced tone and motility; constipation; decreased gastric and pancreatic secertions
Urinary bladder
Predominant tone
effect of gangionic blockage
- Parasympathetic (cholinergic)
- urinary retention
Salivary glands
Predominant tone
effect of gangionic blockage
- Parasympathetic (cholinergic)
- Xerostomia
Sweat glands
Predominant tone
effect of gangionic blockage
- Sympathetic (cholinergic)
- Anhidrosis
Parasympathetic outflow
Craniosacral
sympathetic outflow
Thoracolumbar
Parasympathetic Ganglia
At or near organ
sympathetic Ganglia
Paravertebral, prevertebral
Parasympathetic Pre:post fibers
Long preganglionic
Short postganglionic
sympathetic Pre:post fibers
Short preganglionic
Long postganglionic
Parasympathetic distribution
- More limited
- branching more localized
- pre:post - Some 1:1; some (gut) l:8,000
sympathetic distribution
- Throughout body
- Branches up and down ganglionic chains
- pre:post - 1:20 or more
- overlap Pre:post 3:1
Parasympathetic Discharge
Discreet, localized
sympathetic Discharge
Diffuse discharge
Parasympathetic NT release
Ach from from preganglionic
Ach from from postganglionic
sympathetic NT release
Ach from from preganglionic
NE from from postganglionic
Parasympathetic Postsynaptic receptors
- Nicotinic at ganglia
- muscarine on postsynaptic effector
sympathetic Postsynaptic receptors
- Nicotinic at ganglia
- Alpha, Beta Adrenergic on postsynaptic effector
Parasympathetic Resting tone
Housekeeping
Sympathetic Resting tone
Always active - degree varies from moment to moment and organ to organ
Parasympathetic Massive discharge
None
Sympathetic Massive discharge
During stress; fight or flight
Autonomic nerves
- 2-neuron relay
– preganglionic (myelinated) leaves CNS and synapses with 2nd, postganglionic (unmyelinated) at ganglion
- organs innervated by ANS have a degree of spontaneous activity - some function remains if nerves cut
Visceral afferent nerves
- carry sensory info back to CNS via periperal nerves
- form sensory arm of reflex arcs that control fcns like BP, resp, and other interrelated organ fcns
Somatic motor nerves
- myelinated axons that pass from CNS, through SC, and out to the SkM via peripheral nerve trunks
- no synapses except to the SkM outside CNS
- SkMs depend totally on nervous control
central ANS
- hypo - you know
- medulla - controls vasomotor (BP)
- higher centers - limbic anc cortex
Acetylcholine
- released by
- Pre neurons at all autonomic ganglia
- pre neurons innervating the adrenal medulla
- post para neurons
- Somatic motor neurons (but not part of ANS)
Nicotinic recptors
located on
- post neurons at all autonomic ganglia
- Adrenal medulla cells (a modified ganglia)
- and SkM (not part of ANS)
muscarinic receptors
located on post para
Adrenergic transmission
- NE is released by post symp neurons
– EPI is release by adrenal medulla
- both interact w/ Alpha and Beta receptors
baroreceptor afferents
- through the vagus and glosso nerves to vasomotor center of medulla oblongata
baroreceptor efferents
- sympathetic fibers innervating the arterial resistance vessels
- symp and parasymp fibers innervating the heart