QUESTION 17 A courier service collects information from a location (the source) and then delivers it to another location (the target) and must perform this task as rapidly as possible. The courier functions much like the - - - - - of a neuron. 1. axon and dendrites 2. nodes of Ranvier 3. soma 4. myelin sheath Option 1 is correct. The courier’s task is to collect and transmit information and this task is reflected in the functioning of both the dendrites which receive signals from other neurons or the environment, and the axons that transmit information to other neurons (see COG, pp. 112-113). Options 2 and 4 are incorrect because the nodes of Ranvier and myelin sheath affect transmission speed along the axon, but are not implicated in the actual detection of information. Option 3 is incorrect because the soma is the cell body, and it only has indirect connection, via the axon and dendrites, to other neurons.