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Transcript
BIOL 2010 Human Anatomy & Physiology I
How do the Autonomic and Somatic systems differ?
• Both part of ______
• ________ has __________ in CNS,
whereas ________ has __________,
1 in CNS and 1 in ____________
___________
• Somatic neurons ___________,
whereas Autonomic are _________
• Somatic innervates __________
_______, whereas Autonomic
innervates ___________________
__________________.
• See table 16.1 for more information
What structures comprise the sympathetic division?
• __________________
leave the spinal cord (T1L2 or _______________,
traveling with other axons
through ventral root and
spinal nerve) and enter the
_____________
_____________.
What structures comprise the sympathetic division?
• These axons can synapse
with _______________
___________ in the SCG
and…
• Or they can pass through
to synapse in __________
or _______________.
What structures comprise the parasympathetic
division?
• Preganglionic neurons leave
CNS (____________) to
synapse with postganglionic
neurons in
__________________ in or
near target organs.
What about the enteric portion of the nervous system?
•Nerve plexuses (sensory and
motor neurons) associated with
the _____________.
_______________ detect
chemical and physical changes
_______________ stimulate
smooth muscle contraction
_______________ connect types
1 & 2 together
How are autonomic nerve fibers distributed?
• Sympathetic axons reach
target organs through
___________ and ______
_________
• Parasympathetic axons
reach target organs through
_____________ and _____
__________
• Remember _______
(________) _________
also travel via these nerves.
What neurotransmitters are used at chemical synapses?
• 2 major types of neurons
secreting one of 2 primary
types of neurotransmitters:
_________ neurons =
_____________
_________ neurons =
_____________
• Other substances may
function as
neurotransmitters
How do autonomic receptors vary ?
• Receptors for _______________
come in 2 forms:
__________ = excitatory
(Na+ channels)
__________ = excitatory/inhibitory
(G proteins)
• ______________________ comes
from neurons and/or adrenal
medulla
• Effects… near sympathetic usually
excitatory otherwise variable
responses (see table 16.3)
How is the autonomic nervous system regulated?
• ___________________
control visceral organs,
glands and blood vessels
How is the autonomic nervous system regulated?
• _____________ is general
control center for ANS
• ____________________ etc.
communicate with
hypothalamus thus _________
________________________
• Both sympathetic and
parasympathetic systems can
influence ______________
• Enteric can operate
independently of CNS via
_____________
What is the “big picture” for the autonomic system?
• _______ divisions of ANS can
produce __________ and
__________ responses
• Most organs innervated by
both divisions, w/ __________
________, although not always
and not equally
What is the “big picture” for the autonomic system?
• Sympathetic division causes
more generalized responses
(more divergent and adrenal
medulla activity)
• __________ generally
prepares for _____________
• _____________ generally
responsible for _________
__________ (SLUDD)