Which part of a sensory neuron is primarily responsible for receiving signals from other neurons or receptors?

Which part of a sensory neuron is primarily responsible for receiving signals from other neurons or receptors?

• A. Dendritic zone
• B. Soma
• C. Axon hillock
• D. Synaptic knobs

Answer: (A)

Signals from receptors or other neurons are received primarily by the dendritic zone of a sensory neuron. Dendrites are highly branched extensions lined with receptors that detect neurotransmitters and other stimulus energies, turning those inputs into small electrical changes called postsynaptic potentials. These potentials converge on the soma, where integration occurs; if the combined input at the axon hillock reaches threshold, an action potential is triggered and travels along the axon to the synaptic knobs to communicate with the next neuron. So the dendritic zone is the main receiving region because its structure and receptors are specialized for capturing incoming signals.

Signals from receptors or other neurons are received primarily by the dendritic zone of a sensory neuron. Dendrites are highly branched extensions lined with receptors that detect neurotransmitters and other stimulus energies, turning those inputs into small electrical changes called postsynaptic potentials. These potentials converge on the soma, where integration occurs; if the combined input at the axon hillock reaches threshold, an action potential is triggered and travels along the axon to the synaptic knobs to communicate with the next neuron. So the dendritic zone is the main receiving region because its structure and receptors are specialized for capturing incoming signals.