1. The Nervous System V Review

2. Today’s Lesson
Attendance & Housekeeping
Review
Workbook

3. Housekeeping
“Quest” on Nervous System:
Thursday March 16th

4. Study for Test Review the note packages I gave you
Review pages in the workbook
Know the components of the CNS and their definitions
Know the 3 parts of the brain and what they’re responsible for
Know how to label the neuron (motor and sensory)
Know how neurons send signals
Know the pathway reflexes take
Be able to identify stimulus, reaction and whether reaction is voluntary/involuntary

5. Review

6. Nervous System What is it? 2 components:
The system that receives, processes, stores and transmits information that comes from various parts of the body and the external world.
2 components:
The Central Nervous System (CNS)
The Peripheral Nervous System (PNS)

7. The Brain
The parts of the central nervous system located in the cranium

8. Parts of the Brain
3 main parts:
Cerebrum
Cerebellum
Brain stem

9. Sensory & Motor Parts of the Cerebrum
Frontal lobe: reasoning, speech,
muscle control
Parietal Lobe: sensing, feeling
Occipital Lobe: vision
Temporal Lobe: hearing, language

10. Nerve Cells
Information is transmitted through nerve tissue which is made up of nerve cells
Also called
Neurons

11. What do motor neurons look like?

12. Sending a signal
Travel from one neuron to another via neurotransmitters
These are chemical substances secreted by the axon terminal that travel across the transmission zone between neurons to the next dendrite
Transmission zone is called a synapse

13. Sending a signal
Synapse
Axon terminal
Dendrite

14. Types of nerves From last class! There are three types of neurons:
Sensory neurons
Transmit information from the sensory receptors to the CNS
Motor neurons
Transmit impulses from CNS to the muscles in order to produce movement (voluntary or involuntary)
Interneurons
Neurons that form connections between other neurons
Neither sensory nor motor

15. Reflex Pathway
The sensory receptors pick up a stimulus and change it into electrical impulses.
The sensory or afferent nerve carries the message to the CNS.
The interneuron (found in the grey matter of the spinal cord) received the information and interprets it. It then sends out a response signal.
The motor or efferent nerve transmits the signal to the muscles
Muscles react
This reaction can be voluntary or involuntary

17. Motor Neurons

18. What do motor neurons look like?

19. Sensory Neurons

20. Sensory Neuron
dendrite
Nerve Impulse

22. Remember: you can always come see me if you have questions 
Workbook
Complete pages in your workbook
If you’re done: study for quest!
Remember: you can always come see me if you have questions 