Motor Neuron Structure

1. A_________

Dendrites (Branching extensions that receive incoming signals from other neurons and carry them toward the cell body.) Attached to the cell body (soma)

2. B__________

Cell body (Also called the soma; contains the nucleus and major organelles to sustain the neuron) Central metabolic region of the neuron

3. C__________

Collateral branch (A side branch of an axon that allows a single neuron to communicate with multiple target cells.) Branches off the main axon

4. D____________

Synaptic terminals (Enlarged endings containing vesicles filled with neurotransmitters for chemical signaling.) Extreme distal tips of the axon branches

5. E_____________

Terminal branches (Fine terminal divisions of the axon that spread out before ending in synaptic knobs.) Distal end of the axon

6. F__________

Schwann cell (Neuroglial cells that wrap around the peripheral axon to form the myelin sheath.) Form segments along the axon

7. G__________

Nodes of Ranvier (Gaps between adjacent myelin-forming cells where action potentials jump during saltatory conduction.) Gaps along the myelinated axon

8. H____________

Axon (A single long fiber that conducts nerve impulses (action potentials) away from the cell body.) Extends from the cell body to the target

9. I______________

Nucleus (Prominent central control center housing genetic material (DNA) for cellular protein synthesis.) Located inside the cell body