BI13_Ch14 PP Slides

BI13_Ch14 PP Slides - The Autonomic Nervous System Chapter...

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The Autonomic Nervous System Chapter 14
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Topics General Structure and Function Structure and Function of the Parasympathetic Nervous System Structure and Function of the Sympathetic Nervous System Referred Pain
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The Autonomic Nervous System Targets involuntary functions Cardiac muscle Smooth muscle Glands Signals originate in the brain stem and hypothalamus
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Sympathetic vs. Parasympathetic Send complimentary signals
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Organization of the ANS Efferent signals transmitted through 2 neuron chains Presynaptic neuron cell body in the CNS Postsynaptic neuron cell body in the PNS Ganglion
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Practice Test Questions True or false? The ANS innervates skeletal muscle. True or false? The ANS motor neurons synapse directly with their effector organs? How are the parasympathetic and sympathetic nervous system related to each other?
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The Parasympathetic Nervous System Structure Function Neurotransmitter Drugs
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Parasympathetic Neuron Chain Presynaptic neurons Long Emerge from CNS at brain stem and sacrum Found in cranial nerves never spinal nerves Postsynaptic neurons: Short Near effector tissues
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Oculomotor Nerve (III) Causes pupils to constrict and lenses to bulge Modifies vision to focus on near objects
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Facial Nerve (VII) Stimulates glands of the face to secrete Nasal, lacrimal, salivary
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Glossopharyngeal Nerve (IX) Stimulates the large parotid salivary gland
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Vagus nerve (X) 90% of parasympathetic nervous system Cardiac plexus Pulmonary plexus Celiac Plexus Stomach Liver Gallbladder Pancreas Small intestine Proximal half of the large intestine
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Splanchnic Nerves Run deep to serve organs Carry sacral parasympathetic efferents Innervate Distal large intestine Urinary bladder Reproductive organs
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The Parasympathetic Nervous System Structure Functions Neurotransmitter Drugs
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