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True. Neurons typically have just one axon, which is the long projection that sends signals to other neurons, muscles, or glands.
Bipolar neurons have only one axon and one dendrite with the soma between them. There are probably very few, if any, neurons that contain only a single axon and dendrite. However, the concept is useful because some neurons behave as if they only had a single axon and dendrite. These neurons, called bipolar neurons because their cell body sits in between the axon and dendrite (giving the neuron two "poles"), are abundant in the nervous system. One very important type of bipolar neuron occurs in the retina, and is responsible for how we process light at an early level.
The part of the neuron that receives the majority of inputs is the dendritic tree. In most neurons its appearance is very similar to what a tree would look like in Autumn with no leaves. The part that carries information away and toward the dendrites of other cells is called the axon. There is only one axon per neuron and they can vary quite considerably in their length.
The part of the neuron that decides whether to send a message to the next neuron is the axon hillock. It acts as a gatekeeper by integrating incoming signals from other neurons and generating an action potential if the combined signals are strong enough to reach the threshold.
At the synapse, the electrical impulse between the two neutrons at synapse set of chain chemical reactions which create a chemical impulse at the synapse.
Control genes impede certain genes from expressing themselves and allow others to express themselves/ Thus a liver cell will have basically the same genome as a neuron, but will not express axon development and the neuron will not express bile development.