Study guide exam 3
Dennervation hypersensitivity damage to the ANS increases the effector response to stimulation
Ganglia
a cluster of nerve cell bodies that lie outside the CNS
Mass activation
Divergence-Preganglionic fibers branch to synapse with numerous postganglionic fibers (up, down, level)
Convergence-Postganglionic fibers receive input from numerous preganglionic fibers
Sympathetic system is activated as a unit
Sympathoadrenal System the closely related functioning adrenal medulla and sympathetic nervous system. Promotes fight or flight response
Dual Innervation
Antagonistic- SNS and PSNS exert opposite effects -Heart Rate: SNS increases PSNS decreases
Complementary-SNS and PSNS exert similar effects -Salivary glands: PSNS alone produces watery saliva, SNS and PSNS produce thicker saliva
Cooperative-SNS and PSNS act differently but work together
-Micturition:SNS increases tone of bladder muscles, PSNS promotes contraction
-Penis:PSNS causes erection,ejaculation is due to SNS
What are the two divisions of the ANS?
Sympathetic-fight or flight
Parasympathetic-rest and digest
Sympathetic Nervous System
"Thoracolumbar" -SNS ganglia are found primarily along vertebral column
Preganglionic Neurons: Thoracic and Lumbar levels of spinal cord (T1-L2)
Ganglia: Paravertebral, collateral a.k.a. Prevertebral
Function: Fight or Flight
Parasympathetic Nervous System
"Craniosacral"- most parasympathetic pathways originate in brain stem and sacral region.
Preganglionic Neurons: Brain(midbrain, medulla,and pons) and sacral levels (S2-S4) of spinal cord
Ganglia-Terminal Ganglia
Function: read, relax, and rejuvenate (except when you dont)
What type of neurons are in the ANS?
Motor neurons
Preganglionic Neuron-originates in the CNS, B Fibers, small myelinated
Postganglionic Neuron- C fibers, smaller, unmyelinatd
Why is the white ramus white?
Because it is mostly made up of Preganglionic neurons, which are myelinated giving it its white apperance. These are
Ganglia
a cluster of nerve cell bodies that lie outside the CNS
Mass activation
Divergence-Preganglionic fibers branch to synapse with numerous postganglionic fibers (up, down, level)
Convergence-Postganglionic fibers receive input from numerous preganglionic fibers
Sympathetic system is activated as a unit
Sympathoadrenal System the closely related functioning adrenal medulla and sympathetic nervous system. Promotes fight or flight response
Dual Innervation
Antagonistic- SNS and PSNS exert opposite effects -Heart Rate: SNS increases PSNS decreases
Complementary-SNS and PSNS exert similar effects -Salivary glands: PSNS alone produces watery saliva, SNS and PSNS produce thicker saliva
Cooperative-SNS and PSNS act differently but work together
-Micturition:SNS increases tone of bladder muscles, PSNS promotes contraction
-Penis:PSNS causes erection,ejaculation is due to SNS
What are the two divisions of the ANS?
Sympathetic-fight or flight
Parasympathetic-rest and digest
Sympathetic Nervous System
"Thoracolumbar" -SNS ganglia are found primarily along vertebral column
Preganglionic Neurons: Thoracic and Lumbar levels of spinal cord (T1-L2)
Ganglia: Paravertebral, collateral a.k.a. Prevertebral
Function: Fight or Flight
Parasympathetic Nervous System
"Craniosacral"- most parasympathetic pathways originate in brain stem and sacral region.
Preganglionic Neurons: Brain(midbrain, medulla,and pons) and sacral levels (S2-S4) of spinal cord
Ganglia-Terminal Ganglia
Function: read, relax, and rejuvenate (except when you dont)
What type of neurons are in the ANS?
Motor neurons
Preganglionic Neuron-originates in the CNS, B Fibers, small myelinated
Postganglionic Neuron- C fibers, smaller, unmyelinatd
Why is the white ramus white?
Because it is mostly made up of Preganglionic neurons, which are myelinated giving it its white apperance. These are