What are all the neurons (collectively) in our bodies called? 

Neurons are nerve cells which transfers information using electrical impulses, synaptic transmission and neurotransmitters

What am I?

You can find me at the end of the neuron, I ensure that the message doesn't stop with me and am responsible for sending the information onto the next neuron. 

What am I?

I carry the genetic information of the neuron, maintain it's structure, and provides energy to drive the electrical impulses

What am I?

I am the gaps in the axon of certain neurons. I serves to ensure the rapid conduction of nerve impulses.

A unipolar neuron only transmits messages in one direction.

What doesn't have dendrites at the start of the neuron?

What is responsible for receiving information from the sensory organs and receptors? 

What is responsible for activating a reaction information and doesn't have terminal buttons because it is connected to effector organ. 

This type of neuron is located in the brain and spinal cord, and is a multipolar neuron. 

What is the relay neuron protected by which means it doesn't need nodes of Ranvier and myelin sheaths.