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.
Definition. In English grammar, the present tense is a form of the verb that is represented in English by either the third-person singular-s inflection (for example, She laughs ) or the base form (I/You/We/They laugh ). Also called the non-past. Contrast with the past tense or preterite.