Nervous System Part 1

2. The type of neuron that connects sensory and motor neurons
4. This can change the resting membrane potential
8. Cells that form a myelin sheath in the PNS
12. A fatty coat of insulation around the axon of a neuron
14. Type of neuroglia that wraps around and destroys pathogens & debris in the CNS
17. Another name for the end of the neuron (dendrite) that detects changes in the internal & external environment
18. This type of matter is typically neuron cell bodies
20. The division of the nervous system that dominates when you are resting an ddigesting
22. A bundle of axons in the PNS
23. At rest, the inside of a axon is slightly ___________
24. The type of neuron that brings information into the back of the spinal cord
25. The division of the nervous system that tells skeletal muscles to contract
26. The minimum amount of stimulus needed to cause an action potential
29. The resting membrane _______________ is -70 mV
32. Type of neuroglia that the maintains the blood brain barrier to protect neurons
33. A group of neuron cell bodies in the CNS
34. The division of the nervous system that controls cardiac and smooth muscle and glands
36. Potassium ion (K+) leaves the cell and the voltage drops
37. The functional unit of the nervous system that is specialized to transmit an electrical signal

1. There are usually many of the short extensions of neurons that detect stimuli
3. The sodium potassium pump sends three of these ions out with every turn
5. The end of an axon where neurotransmitters are located
6. The division of the nervous system that dominates when you are in a stressful situation
7. A group of neuron cell bodies in the PNS
9. There are typically few of these long extensions of neurons that transmit an action potential
10. The voltage becomes more negative than the resting membrane potential
11. This type of matter is typically myelinated axons
12. The division of the peripheral nervous system that controls effectors
13. A type of neuroglia that makes and circulates cerebrospinal fluid
15. The part of the nervous system that integrates and processes sensory input
16. Type of neuroglia that wraps around axons in the CNS
19. A group of different types of cells that support neurons
21. A stimulus causes voltage-gated sodium ion (Na+) channels to open and the voltage increases to +40 mV
27. Neuroglia that cushion & protect neuron cell bodies in the PNS
28. The location on an axon where a action potential begins
30. Another name for the muscle or gland that carries out the commands of the control center
31. A bundle of axons in the CNS
35. The type of nerves that branch out of the brain