ANS Flashcards
The nervous system is divided into two systems:
Somatic nervous system
Autonomic nervous system
Both the somatic and the autonomic nervous system include ___ and ____ components
Central nervous system
Peripheral nervous system
In both the ANS and the somatic systems the _____ consists of one neuron coursing from the receptor to the CNS
sensory (afferent)
In the somatic system, the ______ pathway consists of one neuron coursing from the CNS to the effector
Motor (efferent)
In the ANS, the motor pathway from the CNS involves two neurons:
Pre and post ganglionic neuron
Defined as a collection of neuron cell bodies outside the CNS
ganglion
Name of a neuron that has its cell body in the CNS and courses to the autonomic ganglion is
pre-ganglionic neuron
Neurons hat has it’s cell body in the autonomic ganglion and carries the impulse from that ganglion to the effector
post ganglionic neuron
Somatic effectors are ____ muscles
skeletal
Somatic skeletal muscles are _____ and under conscious control
voluntary
The ANS effectors of the body are _____ muscle, ___ muscle and ___
smooth; cardiac; glands (exocrine and endocrine)
The ANS effectors of the body are ___ and function without any conscious control
involuntary
The motor (efferent) component of the ANS is divided into 2 separate systems
Sympathetic
Parasympathetic
“Fight or flight”
sympathetic nervous system
Sympathetic nervous system involves spinal segments:
T1-L2
Ganglia of the sympathetic nervous system are near the ____
spinal cord
The sympathetic nervous system has _____ preganglionic and _____ posganglionic fibers
short; long
The sympathetic nervous system exhibits ____, where stimulation activates many organs at once
unit action
Rest and digest
Parasympathetic nervous system
Parasympathetic nervous system involves these cranial nerves and spinal segments
CN III
CN VII
CN IX
CN X
S2-4
Ganglia of the parasympathetic nervous system lie near or within the _____
target organ
The parasympathetic nervous system exhibits ___ preganglionic and ___ postganglionic fibers.
long; short
Stimunlus of the parasympathetic nervous system involves -__ organ(s) at a time
one
Constricts pupil
parasympathetic
Stimulus flow of saliva
parasympathetic
slows heart beat
parasympathetic
constricts bronchi
parasympathetic
stimulates peristalsis and secretion
parasympathetic
reproductive organs
parasympathetic
dilates pupil
sympathetic
inhibits flow of saliva
sympathetic
accelerates heartbeat
sympathetic
dilates bronchi
sympathetic
inhibits peristalsis and secretion
sympathetic
secretion of adrenaline and noradrenaline
sympathetic.
