The is a thin fiber that carries signals away from the cell body.

axon

Explanation:

Axon is a thin fiber that carries signals away from the cell body. It is an extension responsible for transmitting signals to other cells, such as another neuron, glands or muscles. It is characterized by being longer than dendrites and can reach up to one meter in length in some species. In some neurons, the axon myelin sheath is observed, which is produced by two types of glial cells: the oligodendrocytes in the central nervous system and Schwann cells in the peripheral nervous system.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).