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Difficulty: EasyNervous Coordination and Sense Organs

Which of the following options represents the correct path of a nerve impulse as it travels through a single multipolar neuron?

  1. Dendrite →\rightarrow Cell body →\rightarrow Axon →\rightarrow Axon terminalAnswer
  2. B
    Axon →\rightarrow Cell body →\rightarrow Dendrite →\rightarrow Axon terminal
  3. C
    Cell body →\rightarrow Dendrite →\rightarrow Axon →\rightarrow Axon terminal
  4. D
    Axon terminal →\rightarrow Axon →\rightarrow Cell body →\rightarrow Dendrite

Answer

Dendrite →\rightarrow Cell body →\rightarrow Axon →\rightarrow Axon terminal
Nerve impulse Conduction within a neuron is strictly unidirectional. Dendrites receive incoming stimuli and direct electrical signals to the cell body, which subsequently passes the action potential down the length of the axon to the axon terminals.

Step-by-Step Solution

1
Identify the receiving structure of the neuron
Dendrites receive incoming chemical or physical stimuli from sensory receptors or sensory impulses from preceding neurons.
Dendrites possess receptors designed to initiate electrical changes toward the soma.
2
Trace impulse passage through the cell body to the conducting axon
The impulse moves into the cell body (cyton/soma) and propagates down the elongated axon.
The axon hillock acts as the trigger zone that transmits action potentials away from the cell body.
3
Identify the point of output
The action potential terminates at the axon terminal branches to trigger neurotransmitter release.
Axon terminals form synapses with next neurons or effector cells.

Key Concept

Unidirectional nerve impulse conduction along a neuron
Estimated Time:45s
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Topics

Nervous Coordination and Sense Organs

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