Knowledge center. Amphetamines are drugs which stimulate the CNS (central nervous system) - they are psychostimulant drugs-when overused they can be psychologically and physically addictive. As well as giving the user an enhanced feeling of wakefulness and focus, they also reduce appetite.mphetamines stimulate the central nervous system and the sympathetic part of the peripheral nervous system. Experts say that amphetamines enhance the synaptic activity of three neurotransmitters-dopamine, serotonin and norepinephrine.
Propagation of action potential along myelinated nerve fiber. Saltatory conduction (from the Latin saltare, to hop or leap) is the propagation of action potentials along myelinated axons from one node of Ranvier to the next node, increasing the conduction velocity of action potentials.n addition to increasing the speed of the nerve impulse, the myelin sheath helps in reducing energy expenditure over the axon membrane as a whole, because the amount of sodium and potassium ions that need to be pumped to bring the concentrations back to the resting state following each action potential is decreased.
â¢ Receives signals from other cells and sends them toward the axon. â¢ Sum up, or integrate, the incoming signals. â¢. Axon. The transmitting or conductive region of the neuron. â¢. The axon generates an action potential, an outgoing signal also called a nerve impulse, and conducts it to the next cell.â¢ Label the parts of this neuron: â¢ Neurons receive and integrate signals at one location and transmit an action potential at another location.Page 6. In most neurons, the cell body, or soma, is located centrally. â¢ Multiple similar processes, called dendrites, extend from the soma, forming a structure resembling the branches of a tree. â¢ A thin single process, called the axon, also extends from the soma. Page 5.