Which part of a neuron receives signals from other neurons?

• A. Soma
• B. Axon
• C. Dendrite
• D. Myelin sheath

Answer: (C)

Signals are received by the dendrites, the branched extensions that reach out from the neuron’s cell body. They are studded with receptors at synapses where neurotransmitters from neighboring neurons bind and open ion channels, producing electrical signals called postsynaptic potentials. These inputs are then integrated mainly in the soma and particularly at the axon hillock. If the combined input reaches a threshold, an action potential is generated and travels along the axon to communicate with other neurons. The soma houses the nucleus and helps integrate inputs, the axon carries the signal away, and the myelin sheath speeds up that conveyance. So, the dendrites are the primary sites for receiving signals from other neurons.