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.
Answers. Best Answer: Hi, Note that action potential (the wave of depolarisation from the postsynaptic membrane via saltatory conduction) is unidirectional and therefore must travel towards away from the cell body down the axon.The impulse will always travel away from the cell body towards the axon.The cell body is smaller and branched off an axon in a sensory neurone, so will travel from dendrites towards and then away from the cell body, but away from the cell body and always down the axon. Hooe this helps! Source(s):he impulse will always travel away from the cell body towards the axon. The cell body is smaller and branched off an axon in a sensory neurone, so will travel from dendrites towards and then away from the cell body, but away from the cell body and always down the axon. Hooe this helps! Source(s):