2H Autonomic Nervous System

Receptors to CNS

sensory neurons within peripheral nerves carry impulses from __________ to ___________

CNS to effectors

motor neurons carry impulses from __________ to __________

muscles (smooth, cardiac, skeletal) and glands (endocrine, exocrine)

effectors of the body

somatic and autonomic nervous system

nervous system is divided into

smooth muscle, cardiac muscle, and glands

effectors of ANS

involuntary

ANS effectors are (voluntary/involuntary)

skeletal muscles

effectors of somatic nervous system

voluntary

Somatic effectors are (voluntary/involuntary)

sensory

In both the ANS and somatic systems, the sensory pathway consists of a ________ neuron

1

the somatic motor (efferent) pathway to the skeletal muscles only involve ___ neuron

2

In the ANS, the motor (efferent) pathway from the CNS to effectors involve ____ neurons

ganglion

collection of neuron cell bodies outside the CNS

preganglionic neuron

neuron that has its cell body in the CNS and courses to the autonomic ganglion

postganglionic neuron

a neuron that has its cell body in the autonomic ganglion and carries the impulse from that ganglion to the effector

2

motor component of ANS is divided into ____ separate systems

sympathetic and parasympathetic nervous system

motor divisions of ANS

thoracic; lumbar

sympathetic system involves all the _________ and the first two (or three) ___________ spinal cord segments

thoracolumbar system

anatomical name for sympathetic nervous system

III, VII, IX, X; S2, S3, S4

parasympathetic system involves cranial nerves _____, _____, ______, _______ and the spinal cord segments ______, ______, ______

craniosacral system

anatomical name of parasympathetic system

spinal cord

sympathetic ganglia are near the __________

wall of organ innervated

parasympathetic ganglia are near or within ___________

short; long

sympathetic system has ____________ preganglionic and __________ postganglionic fibers

long; short

parasympathetic system has ____________ preganglionic and __________ postganglionic fibers

opposing

in general the sympathetic and parasympathetic systems have __________ functions

unit (activates many organs at once)

sympathetic system exhibits __________ action

one organ at a time

parasympathetic system stimulus involves ________

dilates pupil

sympathetic effects on eye

constricts pupil

parasympathetic effects on eye

inhibits secretory activity

sympathetic effects on glands (lacrimal, salivary, gastric, pancreas)

stimulates secretory activity

parasympathetic effects on glands (lacrimal, salivary, gastric, pancreas)

Stimulates copious sweating

sympathetic effects on sweat glands

No effect

parasympathetic effects on sweat glands

stimulates to contract (erect hairs, goosebumps)

sympathetic effects on arrector pilorum muscles

No effect

parasympathetic effects on arrector pilorum muscles

increases rate and force of heartbeat

sympathetic effects on heart muscle

decreases heart rate, slows and steadies heart

parasympathetic effects on heart muscle

dilates bronchi

sympathetic effects on respiratory bronchi

constricts bronchi

parasympathetic effects on respiratory bronchi

decreases activity of glands and muscles, constricts sphincters

sympathetic effects on digestive tract

increased motility (peristalsis) and amount of secretions, relaxes sphincters

parasympathetic effects on digestive tract

increased alterness

sympathetic effects on mental alertness

no effect

parasympathetic effects on mental alertness