Nervous System

4. A change that causes a response in an organism or cell.
5. Controls most functions of the mind and body.
6. A junction between nerve cells that impulses cross.
10. Ends of an axon that makes synaptic connections.
11. Connects limbs,organs, and skin to the Central Nervous System.
15. Chemical messengers that boost, carries, and balances signals neurons and body cells.
16. A membrane that receives signals from the presynaptic cell.
17. Large granular body in neurons.
18. Controls voluntary movements of skeletal muscles.
19. Motor neurons that carry impulses from the brain to the limbs, organs, and glands.
20. Cell that transmits information to nerve cells, muscles, and gland cells.
21. A bundle of fibers that uses chemical and electrical signals to transmit sensory and motor information.
22. Spherical part of a neuron that contains the nucleus.
23. A membrane of the axon terminal that faces the plasma membrane of a muscle fiber or neuron.
24. Gaps formed between myelin sheath.

1. Short extensions on the cell body that receive chemical signals and send them to the cell body.
2. Glial cells that help form the myelin sheath.
3. Receptors that receive signals and trigger electrical signals by regulating activity of ion channels.
7. Cells responsible for immune surveillance and homeostatic control in the Nervous System.
8. A insulating layer of fats and proteins that protect nerves.
9. A cable connected to a neuron that allows electric impulses to travel to other neurons.
12. Control center that works autonomously.
13. Sensory receptors on nerve endings.
14. Group of neurons in the Peripheral Nervous System.