What determines whether a neuron is unipolar, bipolar, or multipolar? Draw an example of each.

The correct answer will be neurite (protoplasmic projections).

Neurons can be divided on the basis of differences in the projections of the cell:

1. Unipolar neurons: neurons with only a single projection that functions as both axon and dendrites. They direct impulse in only one direction which are common in invertebrates and at embryonic stage.

2. Bipolar neurons - neurons with two projections of which one act as dendrites and one acts as axons. They are common in sensory organs like the eye and nose where they send signals from the sensory cells to spinal cord and brain.

3. Multipolar neurons - neurons with multiple projections which become multiple dendrites but one axon. They are found in CNS where impulse enter through dendrite and are directed in one particular direction.

Thus, neurite (protoplasmic projections) is the correct answer.