Answer:
Axon hillock
Step-by-step explanation:
The part of a neuron that could be considered its "gate" is the axon hillock. The axon hillock is the region of the neuron that connects the cell body (soma) to the axon. It is the site where the neuron integrates signals from other neurons and decides whether to generate an action potential, which is the electrical signal that travels down the axon to transmit information to other neurons or muscles. The decision to generate an action potential is based on whether the sum of the signals received at the axon hillock exceeds a certain threshold. So, in this sense, the axon hillock can be considered the "gatekeeper" of the neuron, controlling whether or not signals are transmitted down the axon.