BIO SCI E109 Chapter Notes - Chapter 10: Adrenal Gland, Chromaffin Cell, Catecholamine

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10. 1 autonomic nervous system: the ans regulates the activity of visceral effectors(smooth muscle, cardiac muscle, and glands) Involuntary control from hypothalamus, brain stem, and spinal cord. Unlike skeletal muscle, tissue innervated by the ans often function to some extent even if their nerve supply is damaged or cut. Dual innervation: an arrangement which most organs receive neural innervation from both the sympathetic and parasympathetic branches of the ans. Ens=enteric nervous system: can function autonomously, and can also be regulated by ans. Ens contains sensory neurons[monitor chemical changes within the gi tract as well as the stretching of its walls], interneurons, and motor neurons: autonomic motor neurons and a visceral effector. Another name craniosacral division of the ans: preganglionic neurons cell body: in brain stem and sacral . Thoracolumbar division of the ans: preganglionic neurons cell body: in the thoracic and upper lumbar regions of the spinal cord. Exit the cns through 4 cranial nerves( sacral nerves(s2-s4)

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