Which of the following is the correct sequence of information flow within the neuron?

Question

BlackTom AI · Accepted Answer

To understand the question, let's recall the basic flow of information in a neuron.
Option 1: 'Axon to soma (cell body) to dendrites.' This is the reverse of how signals typically propagate. Signals originate at the dendrites and cell body, then travel down the axon, not from the axon back toward the soma and dendrites.
Option 2: 'Dendrites to synapse to axon.' While signals pass from dendrites toward the cell body and then along the axon, the term 'synapse' refers to the junction where communication occurs, not a sequential carrier in the info flow. The sequence omits the crucial step of the soma and the proper transport path along the axon itself.
Option 3: 'Glia to dendrites to axon.' Glial cells (such as astrocytes, oligodendrocytes) provide support and insulation but are not the information carriers in the neuron's primary signaling path. They do not convey the action potentials from dendrites to axon as part of the neuron’s information flow.
Option 4: 'Dendrites to soma (cell body) to axon.' This option accurately reflects the canonical sequence: input signals are received by dendrites, processed through the soma, and transmitted down the axon as an electrical impulse toward the synapse. The soma integrates inputs and then directs the signal along the axon via the neuron's wiring.
In sum, each incorrect option misrepresents either the direction, the role of the synapse, or the involvement of glial cells, while the correct description aligns with the established neural pathway from dendrites to soma to axon.

PSY 1001 (001) Final Exam/Exam 4

Which of the following is the correct sequence of information flow within the neuron?

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