It will be come a terminal node. Normally we call terminal nodes leaf nodes because a leaf has no branches other than its parent.

This is called saltatory conduction.

an object connected?? if so, it can be called a node/ a DTE (Data Terminal Equipment)

Node.

A node describes any device that connects to the network.

If every non-terminal node (any node except root node whose degree is not zero) in a binary tree consists of non-empty left and right subtree, then such a tree is called strictly binary tree.