Alter just one section of the protein responsible for making a muscle cell a muscle cell — and it makes nerve cells instead March 19 ... Faced with the incredible variety of structure and composition ...

Reflex actions are quick because there is a direct link in the spinal cord called an inter neuron (between the sensory neuron and a motor neuron) that causes a muscle to make the protective response.

(1) A nerve impulse arrives ... (5) Ions flow into the postsynaptic neuron, which generates an action potential when a threshold level is reached.

What really happens in our brain when we think or move? This question, as old as it is fascinating, takes a new turn thanks ...