1. A Review of
The Nervous System

2. The Nervous System
The basic unit of the nervous system is called…

3. The Nervous System ANSWER
Neuron

4. The Nervous System Label the Parts of a Neuron 4. 3. 2. 5. (gap)
1. (outer layer) 6.
7. (inner tube)

5. The Nervous System ANSWER
Myelin Sheath
Nucleus
Cell Body
Dendrites
Synapse
Axon Terminal
Axon

6. The Nervous System
The nervous system that consists of the brain and spinal cord.

7. The Nervous System ANSWER
Central Nervous System

8. The Nervous System
On your drive to school you just miss being in an accident. As a result, your heart rate sky rockets, you start to sweat and your breathing gets shallow. This is all caused by which nervous system?

9. The Nervous System ANSWER
Sympathetic N.S.

10. The Nervous System
This nervous system takes care of digestion, heart rate and breathing all without you having to think to about it.

11. The Nervous System ANSWER
Autonomic N.S.

12. The Nervous System
Anytime you move a muscle in your body you are using this nervous system.

13. The Nervous System ANSWER
Somatic N.S.

14. The Nervous System
After giving a speech in class you finally get to go to your seat and you feel your breathing slow down, heartbeat slow and you stop sweating. This is a result of which nervous system?

15. The Nervous System ANSWER
Parasympathetic N.S.

16. The Nervous System
The order of neurons that are involved in a reflex.

17. The Nervous System ANSWER
Sensory Neuron-Interneuron-Motor Neuron

18. The Nervous System
The receiving ends of a neuron are called…

19. The Nervous System ANSWER
Dendrites

20. The Nervous System
Area of the neuron that contains the nucleus.

21. The Nervous System ANSWER
Cell Body

22. The Nervous System
The part of a neuron where action potential takes place.

23. The Nervous System ANSWER
Axon

24. The Nervous System
This fatty substance covers the axon and serves as an insulator to speed up action potential.
If it degenerates, you have multiple sclerosis

25. The Nervous System ANSWER
Myelin Sheath

26. The Nervous System
The end of a neuron is called.

27. The Nervous System ANSWER
Axon Terminals

28. The Nervous System
A “trigger” in the environment that causes action potential. It can be light or pressure or even a neurotransmitter.

29. The Nervous System ANSWER
Threshold

30. The Nervous System
What is happening when you feel intense pain or pressure?

31. The Nervous System ANSWER
More neurons fire

32. The Nervous System
Put the following steps of action potential in order:
A. The axon returns to a negative charge inside with positive on the outside (dominoes set back up)
B. A stimulus triggers threshold and positive ions begin to enter the beginning of the axon giving it an electrical charge.
C. A chain reaction occurs and the charge travels down the axon (like dominoes falling).

33. The Nervous System ANSWER
B-C-A

34. The Nervous System
The transfer of a message from one neuron to another is called…

35. The Nervous System ANSWER
Synaptic Transmission

36. The Nervous System
Put the following steps of synaptic transmission in order:
A. Receptor site opens and allows positive ions to enter the dendrite.
B. Neurotransmitters act like a key bonding with the receptor site and unlocking it
C. Action Potential reaches the axon terminals
D. This triggers the release of neurotransmitters from their vesicles into the synapse

37. The Nervous System ANSWER
C-D-B-A

38. The Nervous System
The gap between two neurons is called?

39. The Nervous System ANSWER
Synapse

40. The Nervous System
Name the Three Ways that Drugs Impact Synaptic Transmission.

41. The Nervous System ANSWER
Drug mimics the neurotransmitter and fits to the receptor sites and triggers more firings of the neuron
Drug blocks the receptor site so that neurotransmitters cannot fuse with the receptor site stopping action potential.
Drug blocks the reuptake of the neurotransmitter so that it stays in the synapse longer and fuses with the receptor sites more often causing more action potential.

42. The Nervous System
Why does it take longer to have a person squeeze the opposite shoulder of the person in front of them rather than just squeezing the same shoulder?

43. The Nervous System ANSWER
Requires Thinking which takes time.

44. The Nervous System
How does the Nervous System and Endocrine System differ?

45. The Nervous System ANSWER
Nervous System – Fast, uses neurons and action potential to send messages which don’t last long
Endocrine System – Slow, uses bloodstream to send hormones that do last a long a time once they arrive.

46. The Nervous System
Name the type of neuron and order in which they occur during a reflex.

47. The Nervous System ANSWER
Sensory Neuron – Interneuron – Motor Neuron