1. Nervous System

2. Root Words

3. Neurons Units of nervous system that transmits information in
the form of electrochemical changes

4. Dendrites: Receive electrochemical signals

5. Dendrites: Receive electrochemical signals
Axons: Extensions that send information

6. Dendrites: Receive electrochemical signals
Axons: Extensions that send information
Synapse: The junction between two communicating neurons

7. Dendrites: Receive electrochemical signals
Axons: Extensions that send information
Synapse: The junction between two communicating neurons
Myelin Sheaths: Fatty coating around Axon that insulates and increases rate of transition

8. Central Nervous System (CNS)

9. Central Nervous System (CNS)
Consisting of Brain and Spinal cord

10. Peripheral Nervous System (PNS)

11. Peripheral Nervous System (PNS)
Consists of peripheral nerves that sends message back to CNS

12. Peripheral Nervous System (PNS)
Consists of peripheral nerves that sends message back to CNS
2 parts:
Somatic
Autonomic

13. Somatic Nervous System
Part of the PNS that is responsible for nearly all voluntary muscle movement

14. Somatic Nervous System
Part of the PNS that is responsible for nearly all voluntary muscle movement
Exception: Reflexes

15. Autonomic Nervous System
Part of the PNS that regulates the functions of internal organs such as the heart, stomach and intestines.

16. Autonomic Nervous System
Part of the PNS that regulates the functions of internal organs such as the heart, stomach and intestines.
2 parts:
Sympathetic Nervous System
Parasympathetic Nervous System

17. Sympathetic Nervous System
Part of the Autonomic system that is responsible for “Fight or Flight”
Works by increasing heart rate and blood pressure, and slows down unnecessary systems
Often animals will soil themselves when fighting or scared

18. Parasympathetic Nervous System
Part of the Autonomic System that is responsible for “Rest and Digest”
Lowers blood pressure, heart rate and works to save energy

19. CNS
PNS
Autonomic
Somatic
Sympathetic
ParaSympathetic

20. Brain Teaser A H I M N O T U V W
Which of the letters above does not belong with the rest?
N It is not a mirror-image of itself

21. Resting Potential
When a nerve cell is undisturbed, the membrane remains in a polarized state (Always negative inside)

22. Threshold Potential
Approximately -55 millivolts, a level, when reached, will result in an action potential, sending a neural signal.

23. Action Potential
Sodium ions (NA +) and Potassium ions (K+) diffuse in and out of the neuron, creating a rapid sequence of depolarization and repolarization.

25. Anatomy of the Brain Cerebrum : largest part of human brain
- Responsible for:
- Thought
- Language
- Senses
- Memory
- Voluntary movement

26. Anatomy of the Brain Cerebellum : at base of brain -Responsible for:
- Muscle coordination
- Balance
- Posture

27. Anatomy of the Brain Brain Stem : connects brain to spinal cord
-Responsible for:
- Breathing
- Swallowing
- Heartbeat
- Blood pressure

28. Brain Teaser
There is a town where 5% of all the people living there have unlisted phone numbers. If you selected 100 names at random from the town’s phone directory, on average, how many of these people would have unlisted phone numbers?
0 They would not be in the phone book if their number was unlisted

29. Problems of the Nervous System
Concussion
A temporary disturbance of the brain’s ability to function due to a hard blow to the head

30. Paralysis
A loss of sensation and movement of part of the body due to an injury of the spinal cord or brain

31. Parkinson’s Disease
The brain does not produce enough of the neurotransmitter that transmits messages from the brain to the muscles
Symptoms: tremors, rigid muscles, shuffling walk, and loss of facial expression
Red areas show where chemical is stored

32. Alzheimer’s Disease
A gradual shrinking of the neurons in the cerebrum
Symptoms: memory loss, emotional disturbances, inability to function on own, death

33. Epilepsy
Abnormal transmission of messages between the neurons in the brain
Symptoms: seizures