Which component at the end of a neuron forms the synapse with target cells to transmit signals?

Which component at the end of a neuron forms the synapse with target cells to transmit signals?

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

Answer: (D)

The synaptic knob at the distal tip of the axon forms the synapse with target cells and transmits signals. This structure houses synaptic vesicles filled with neurotransmitters and is where release occurs when an action potential arrives and calcium influx triggers vesicle fusion with the presynaptic membrane. The released neurotransmitters cross the synaptic cleft and bind to receptors on the postsynaptic cell to propagate the signal. Dendritic zones are the input regions that receive signals, the soma is the cell body that integrates information, and the axon hillock is where action potentials are initiated.

The synaptic knob at the distal tip of the axon forms the synapse with target cells and transmits signals. This structure houses synaptic vesicles filled with neurotransmitters and is where release occurs when an action potential arrives and calcium influx triggers vesicle fusion with the presynaptic membrane. The released neurotransmitters cross the synaptic cleft and bind to receptors on the postsynaptic cell to propagate the signal. Dendritic zones are the input regions that receive signals, the soma is the cell body that integrates information, and the axon hillock is where action potentials are initiated.