The axon of the sensory neuron is very close to the dendrite of the motor neuron. The axon of the sensory neuron sends a chemical signal called a neurotransmitter to the dendrite of the motor neuron.
1 You should install the mailbox with the bottom of the box at a vertical height of between 41-45 inches from the road surface. . 2  Your house number should be clearly marked on the mailbox with painted numbers or stickers no less than 1 high.
To keep the mailbox upright, it is recommended that the mailbox be 24 inches underground. Since the road and the curb conditions change from city to city and state to state, the USPS asks that people contact their local postmaster to ask for approval.