The summed influence of their input determines whether or not an action potential will be realized and a nerve impulse will be sent 19、 down the axon extending below.,(b) Micrograph of a neuronal cell body with numerous synapses.,Glia or neuroglia: named from the Greek word for glue. ...
action potentials can only occur at the nodes and are conducted from node to node - jumping, which speeds up nerve impulse conduction and conserves energy myelination creates a faster nerve conduction that demyelination what is the net effect of myelination on nerve impulse conduction?
Fig. 1 shows an example of nerve-impulse transmission across such a synapse. The pre-junctional axon was stimulated with external electrodes; and its action potential, recorded intra-cellularly close to the synapse, is shown on the upper trace. The ensuing post-synaptic response, also recorded ...
a信贷部总经理 Credit department general manager[translate] a在空闲的时候 At idle time[translate] aGas rings and around ranges 小煤氣爐和在範圍附近[translate] aTransmission of nerve impulse_Serotonin, dopamine, histamine receptors 神经impulse_Serotonin,多巴胺,氨基酸感受器官传输[translate]...
Transmission of the pneumatic AST-leg segment pressure to the muscle: 97.7% (Q25%/Q75%: 89.2/99.8). Already in the low AST pressure field (20-40 mm Hg) a severe hypoxia occurred in one case. A reduction of MRP was noticed at an AST pressure rate of 10 mm Hg. In 5 of 6 cases...
nerve impulse 神经系统中快速传递信息的动作电位。又称锋电位。神经冲动是以全或无方式不衰减地沿着神经纤维传导的。动作电位的传导速度一般约每秒0.5～200米。正常情况下神经冲动由胞体传向轴突的远端,如用人工刺激,冲动可以逆向传导。顺向与逆向传导的速度是相同的。若用电刺激同时引起两个向相反方向传导的神经冲动...
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Microchemical Reactions in Nerve Impulse TransmissionThe electrical signals in biological cells are generated in micro-reaction spaces of the cell membranes. The bioelectric signals and other bioelectric potential changes of nerve and muscle cells are caused by cross-membrane ion flows; and the most ...
In neuron-to-neuron synaptic transmission, when a nerve impulse reaches the terminal bouton of the presynaptic neuron, it causes the terminal bouton to secrete ( ) into the synaptic cleft.(0.5分)
areaction time in an emergency involves many different physical factor such as the production of the nerve impulse,perception of the signal, speed of response and transmission to the muscles 反应时间在紧急状态介入许多另外物理因素例如神经冲动的信号的生产,反应的悟性,速度和传输对肌肉 [translate] ...