BIOL 2010 Human Anatomy Physiology I How do the Autonomic and Somatic systems differ? Both part of ______ ________ has __________ in CNS, whereas ________.

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 (T1-L2 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 _______________.

• Preganglionic neurons leave CNS (____________) to synapse with postganglionic neurons in __________________ in or near target organs.

What structures comprise the parasympathetic division?

•Nerve plexuses (sensory and motor neurons) associated with the _____________.

_______________ detect chemical and physical changes

_______________ stimulate smooth muscle contraction

_______________ connect types 1 & 2 together

What about the enteric portion of the nervous system?

• Sympathetic axons reach target organs through ___________ and ______ _________

• Parasympathetic axons reach target organs through _____________ and _____ __________

• Remember _______ (________) _________ also travel via these nerves.

How are autonomic nerve fibers distributed?

• 2 major types of neurons secreting one of 2 primary types of neurotransmitters:

_________ neurons = _____________

_________ neurons = _____________

• Other substances may function as neurotransmitters

What neurotransmitters are used at chemical synapses?

• 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 do autonomic receptors vary ?

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)