Answer: trigger zone
The region on the neuron where action potentials are generated is called the ______.
Several types of cells support an action potential such as plant cells muscle cells and the specialized cells of the heart (in which occurs the cardiac action potential). However the main excitable cell is the neuron which also has the simplest mechanism for the action potential. Neurons are electrically excitable cells composed in general of one or more dendrites a single soma a single axon and one or more axon terminals. Dendrites are cellular projections whose primary function i…
Axons are the primary transmission lines of the nervous system and as bundles they form nerves. Some axons can extend up to one meter or more while others extend as little as one millimeter. The longest axons in the human body are those of the sciatic nerve which run from the base of the spinal cord to the big toe of each foot. The diameter of axons is also variable. Most individual axons are microscopic in diameter (typically about one micrometer(µm) across). The largest mammalian axons can reach a diam…
A motor neuron is a neuron whose cell body is located in the motor cortex brainstem or the spinal cord and whose axon projects to the spinal cord or outside of the spinal cord to directly or indirectly control effector organs mainly muscles and glands. There are two types of motor neuron – upper motor neurons and lower motor neurons. Axons from upper motor neurons syna...

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