Question

what key principle does the neuron doctrine establish about brain structure? the brain is a single, continuous web of tissue the brain is made of individual cells not one connected tissue the brains primary unit is electrical pathways, not cells the brain is entirely chemical with no electrical signaling

Explanation:

The neuron doctrine posits that the nervous system is composed of individual cells (neurons) rather than a continuous, fused - together web of tissue. Neurons are distinct structural and functional units.

Answer:

The brain is made of individual cells not one connected tissue