Nerve impulse. Definition. noun. (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.or instance, in neuromuscular junction, the nerve impulse moves along the axon of a nerve cell to instruct a muscle cell to contract. Word origin: nerve + impulse. See also: action potential. Please contribute to this project, if you have more information about this term feel free to edit this page.
Past Tense. Definition of Past Tense. In grammar, past tense refers to a verb-tense combination whose sole purpose is to state an action to have happened in the time that has passed. It is second to present tense, in which the action takes place in the present moment. A sentence in past tense always uses the second form of verb.
Word forms: plural past participles countable noun In grammar, the past participle of a verb is a form that is usually the same as the past form and so ends in '-ed'. A number of verbs have irregular past participles, for example 'break' (past participle 'broken'), and 'come' (past participle 'come').