A neuron has three basic parts: the dendrites, the cell body, and the axons. Some neurons have a fatty layer covering called around their axons. This layer isn’t continuous, and the gaps are called . The action potential jumps through these gaps to the transmission.

A neuron has three basic parts: the dendrites, the cell body, and the axons. Some neurons have a fatty layer covering called 1] The myelin sheath around their axons. This layer isn’t continuous, and the gaps are called 2] nodes of Ranvier . The action potential jumps through these gaps to 3] speed up the transmission.

Explanation:

d. groundwater flows through the subsoil and deposits minerals.