Essentially, nerve cells, also known as a neurons, are the active component of the nervous system. Neurons communicate with each other as well as with other cells through electric signals (nerve impulses), which in turn allows effector organs to respond to the appropriate stimuli. ...
A nerve cell conducts an electrochemical impulse because of changes that take place in the cell membrane. These changes allow movement of ions through the membrane, setting up currents that flow...Hobbie, Russell K.Professor of Physics, Emeritus University of MinnesotaRoth, Bradley J....
Schwann cells form a protective sheath around nerve fibres and ensure that nerve impulses are transmitted rapidly. If these cells are missing or damaged, severe neurological diseases may occur as a result. Researchers at Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) have succeeded in demon...
1.Any of the impulse-conducting cells that constitute the brain, spinal column, and nerves in vertebrates, consisting of a nucleated cell body with one or more dendrites and a single axon. 2.A similar impulse-conducting cell in invertebrates. In both senses also callednerve cell. ...
The meaning of NERVE IMPULSE is the progressive physicochemical change in the membrane of a nerve fiber that follows stimulation and serves to transmit a record of sensation from a receptor or an instruction to act to an effector —called also nervous im
试题来源: 解析 which [详解]考查定语从句。句意:这些神经细胞通过电脉冲连接起来。分析句子结构可知,此处应为关系词引导的非限制性定语从句,从句中缺少主语,所以使用关系代词,先行词nerve cells指的是物,that不能引导非限制性定语从句。故填which。反馈 收藏 ...
Nerve impulses jump between nerve cells through the use of: a. hormones. b. calcium ions. c. neurotransmitters. d. pheromones. Synapses: Synapses are junctions between neurons, or nerve cells. Along the length of neurons, impulses are prop...
Electrical activity in the form of nerve impulses being sent and received to and from cortical neurons is always present, even during sleep. 大脑皮层神经元不停地发送、接收神经冲动信号,即使在睡觉时也不例外。 He and I were always kidding around, but he never could get up the nerve to ask ...
Also found in: Thesaurus, Medical. sen′sory neu`ron (or nerve`), n. a nerve cell that conducts impulses from the periphery of the body to the central nervous system. Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by ...
Schwann cells are glial cells that support neurons in the peripheral nervous system. Schwann cells help speed up the conduction of nerve impulses in the peripheral nervous system. This is why we can think about moving our feet and complete the action almost simultaneously. The Schwann cells speed...