Question 1
What is the structural unit of nervous tissue?
The right answer is the one marked above.
The neuron. The nerve cell, or neuron, is specialised for the transmission of impulses, and nervous tissue is built from them.
The axon is one process of a neuron, the myelin sheath wraps that axon, and a ganglion is a collection of cell bodies. All three are parts or groupings, not the unit.