North Carolina Vacations in the Smoky Mountains at Sapphire Valley Resort. From single bedroom cabins/cottages, to town homes on Fairfield Lake, to 5 and 6 bedroom estates overlooking Sapphire Valley, the Sapphire Valley's High South Rentals is the place to start. [Find Rentals]
nerve-wracking - extremely irritating to the nerves; nerve-racking noise; the stressful days before a war; a trying day at the office. nerve-racking, stressful, trying. disagreeable - not to your liking; a disagreeable situation.
Nerve impulse. (1) The movement of action potential along a nerve fiber in response to a stimulus (such as touch, pain, heat or cold). (2) The relaying of a coded signal that travels along a nerve cell membrane to an effector, such as muscle, gland or another nerve cell. Supplement. A nerve impulse is the relaying of a coded signal from a nerve cell to an effector (a muscle cell, a gland cell or another nerve cell) in response to a stimulus. It is the means by which a nerve cell communicates with another cell.