What maintains the ionic gradients across the resting membrane of a...

Based on the number of axons and dendrites, neurons are divided into three types: multipolar (with one axon and two or more dendrites), bipolar (with one axon and one dendrite), and unipolar (cell body with one axon only).Nissl’s granules are granular bodies in the cell body of a neuron. They are composed of typical cell organelles and are also present in the dendrites. The synaptic knob is a bulb-like structure at the distal end of the axon of a neuron. It possesses synaptic vesicles containing neurotransmitters. Dendrites are short fibres that branch repeatedly and project out of the cell body

The ionic gradients across the resting membrane are maintained by the active transport of ions by the sodium-potassium pump which transports 3 Na⁺ outwards for 2 K⁺ into the cell. The electrical potential difference across the resting plasma membrane is called the resting potential. The outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged and therefore is polarised.