What are several types of stimuli that we can differentiate at nerve endings?
3) Axon: There is only one axon per neuron. It carries the nerve impulse away from the soma, to the effecter organs. The axon can be very long. At the axon end are vesicles which release neurotransmitters (substances which stimulate the effecter organ to work). Most axons are white due to a lipid substance, myelin, which covers the axon. Myelin acts to insulate the axon and allows the nerve impulse to move at “lighting speed” (measured at 268 miles per hour!) 4) Synapse: The area or opening between the effecter end of the nerve and effecter organ. The diagram below represents the terminal end of an axon containing vesicles and the receptor area of the effecter. Do you remember what is released from a? from c (similar to the muscular system?) There are other types of cells associated with the nervous system. The neuroglia cells act as support cells. Types of neuroglia cells include the Schwann cell, which form the myelin sheath around axons and the astrocyte, which help form the blood b
