Books and Articles. 1  Baker, George E., editor The Works of William H. Seward, (Redfield, 1853-84). 2  Bancroft, Frederic, The Life of William H. Seward, (Harper & Brothers, 1900). 3  Estrem, Andrew, The Statesmanship of William H. Seward as Seen in His Public Career Prior to 1861, (Lutheran Publishing House, 1892).
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.
An action potential, which is the nerve impulse, occurs when a threshold is reached. Upon stimulation, the sodium gates open, Na+ flows into the axon, and the action potential swings up from -65mV to +40 mV.. The axon of a neuron conducts nerve impulses away from the cell body. Neurons that conduct messages from a sense organ to the central nervous system are called sensory, or afferent neurons. Those neurons that conduct an impulse from the CNS to a muscle or gland are called. motor, or efferent, neurons.