Autonomic Nervous System
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Created by:
tickledpixel on November 20, 2011
Subjects:
Autonomic Nervous System, Anatomy and Physiology, A&P
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20 terms
Terms | Definitions |
|---|---|
 Pre-Ganglionic Neuron | Neuron from CNS to ganglion |
| Ganglionic Neuron | extends from cell body to effector cells or an effector organ--second neuron in the pathway |
| Autonomic Ganglion | any of the ganglia of the autonomic system whose unmyelinated fibers innervate the internal organs |
| Parasympathetic Division | part of the ANS that restores the body to normal functioning after arousal and is responsible for the day-to-day functioning of the organs and glands |
| Sympathetic Division | Part of autonomic division; mobilizes the body in times of stress, danger or intense emotional arousal; "fight-or-flight" response |
| Visceral Sensory Neurons | transmit information about our internal conditions and the status of other organ systems |
| Visceral Reflex Arcs | visceral sensory neurons and autonomic neurons form many spinal reflexes |
| Referred Pain | pain felt at a particular site, but originates from another location |
| Cholinergic Fibers | Nerve endings of the autonomic nervous system that liberate the neurotransmitter acetylcholine. |
| Adrenergic Fibers | Any of the fibers that transmit impulses to other nerve cells, smooth muscle, or gland cells by norepinephrine |
| Nicotine Receptors | promotes the release of acetylcholine when it is supposed to happen and only when the basal forebrain is firing, honors temporal firing problem is that nicotine receptors become desensitized to nicotine quickly |
| Muscarinic Receptors | membrane receptors sensitive to acetylcholine and to muscarine, a toxin produced by certain mushrooms. |
| Alpha Adrenergic Receptors | are found predominantly on smooth muscle membranes (most arteries and veins) and when stimulated by NE and EPI produce contraction |
| Beta Adrenergic Receptors | receptors located on postsynaptic effector cells of tissues, muscles, and organs stimulated by specific autonomic nerve fibers. |
| Vasomotor Tone | a moderate state of vasoconstriction in a blood vessel that sets the resting level of systemic vascular resistance |
| Parasympathetic Tone | Normal heartbeat, and base activity levels for digestion and urinary tracts |
| Biofeedback | a training program in which a person is given information about physiological processes (heart rate or blood pressure) that is not normally available with the goal of gaining conscious control of them |
| Raynaud's Disease | small arteries in fingers and toes constrict more tightly in response to cold resulting in blue fingers and toes |
| Autonomic Dysreflexia | Complication of a Spinal Cord Injury (SCI). It is an abnormal response to a noxious stimulus that results in extreme rise in blood pressure, pounding headache, and profuse sweating. this complication is deemed a medical emergency if not reversed quickly. |
| Vagotomy | cutting the vagus nerve to reduce stomach stimulation, used to treat an ulcer |
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