sympathetic division vs parasympathetic

where can preganglionic neurons synapse

• sympathetic chain ganglia

• collateral ganglia

• adrenal medullae

what happens in all of the preganglionic neuron routes in the sympathetic nervous system

• exit through ventral root, spinal nerve, white ramus, to the spinal chain ganglia

targets of a neuron if the postganglionic neurons exit the SCG

• thoracic cavity, head, body wall, and limbs

what happens if a neuron passes through SCG without synapsing

• it travels down the splanchnic nerve and then synapses in the collateral ganglion

which preganglionic neurons synapse at suprarenal medullae

• T5-T8

what kind of ganglionic neurons are SCG

• paravertebral

which kind of neurons are collateral ganglia

• prevertebral ganglia

what cranial nerves make up the parasympathetic division

• oculomotor

• facial

• glossopharyngeal

• vagus

what is a neuroeffector junction receptor

• a motor neuron releases a neurotransmitter to a target

neuroeffector junction receptors in the sympathetic division

• alpha adrenergic

  • in smooth muscle

  • constricts peripheral blood vessels

  • closure of sphincters

• beta adrenergic

  • skeletal muscle, smooth muscle of airways like heart and liver

  • dilates blood vessels to skeletal muscle

  • dilation of airway passages

  • heart contract= stronger

• muscarinic cholinergic

  • found in sweat glands and blood vessels

  • provides a method for regulating sweat gland secretion

neuroeffector junction receptors of parasympathetic system

• muscarinic cholinergic

  • found at all cholinergic junctions of parasympathetic system

  • can be inhibitory or excitatory