Autonomic nervous system Flashcards
two divisions of the autonomic nervous system
sympathetic and parasympathetic
this division emerges from the thoracic and lumbar vertebral regions in the back
often referred to as the THORACOLUMBAR SYSTEM
sympathetic nervous system
this division emerges from the brain and the sacral vertebral regions
often referred to as the CRANIAL-SACRAL SYSTEM
parasympathetic nervous system
what is the sequence of efferent motor nerves that make up the chain in both the sympathetic and parasympathetic nervous system
preganglionic neuron > ganglion > postganglionic neuron
a cluster of neuronal cell bodies outside of the CNS
ganglion
neuron that has its cell body in the brain or spinal cord and extends its axon out from the CNS to a cluster of neuronal cell bodies outside of the CNS
neuron that is before the ganglion
preganglionic
neuron that carries the impulse from the ganglia to the target organ
postganglionic
the sympathetic preganglionic neuron extends out from the spinal cord and either synapses with a neuron within the ganglion chain or passes through the ganglion chain and synapses with what?
explains why sympathetic nervous system responses are usually spread throughout the body and involve several organs simultaneously
a neuron located beyond the sympathetic chain
which part of the sympathetic ganglion chain is the longest
postganglionic neuron
parasympathetic preganglionic neurons originates from what two locations
brain and sacral region of the spinal cord
this system helps the body cope with emergency situations
sympathetic nervous system
brings the body back to a resting state, facilitates all the processes that will replace body resources used up during the emergency
rest and restore system
parasympathetic nervous system
sympathetic nervous system primarily uses this neurotransmitter at the postganglionic synapse
norepinephrine and epinephrine
neurons that are released by norepinephrine
adrenergic neurons
epinephrine and norepinephrine come from where
this location acts as a cluster of adrenergic neurons
the medulla of the adrenal gland