IGCSE Biology 2026: Coordination and Response Complete Practice Test

The main idea here is how a neuron sends signals along its length. The elongated part that carries information along as electrical impulses is the axon. It conducts action potentials away from the cell body toward other neurons, muscles, or glands. Dendrites, in contrast, are short branches that receive signals from other neurons; the cell body houses the nucleus and processes signals; and the synapse is the junction where a signal is transmitted to the next cell.