1. January 3, 2018 Objectives: Journal: Label the structure of a neuron
Explain how the nervous system is broken up into parts
Differentiate between neurons and glial cells
Journal:
What makes up the nervous system?

2. Nervous System

3. Functions of the Nervous System:
Memory
Thinking
Decision making

4. Parts of the Nervous System
Central Nervous System (CNS)
Brain and spinal cord
Controls all basic bodily functions and responds to external changes
Peripheral Nervous System (PNS)
Nerves
Connects the CNS to the rest of the body

5. Somatic Nervous System
Parts of PNS:
Somatic Nervous System
Controls skeletal muscle
Under conscious control
Autonomic Nervous System
Controls smooth muscle, cardiac muscle, and glands
Not under conscious control

6. Parts of the Autonomic Nervous System
Parasympathetic
Resting and digesting branch
Sympathetic
Fight or flight response

7. Nervous Tissue Made up of:
Neurons: carry out control functions, amitotic
Neuroglia aka Glial Cells: support cells for the nervous tissue, able to divide

8. Neuron Parts
Neuron body: functions in cell metabolism

9. Dendrites: receive signals from the environment

10. Axon Hillock : generates signals
Axon: sends signals to axon terminal

11. Axon terminal: connects to a receiving cell

12. Synapse: space between the axon terminal and the receiving cell

13. Myelin sheath: lipid insulation that covers parts of the axon

14. Nodes of Ranvier: bare spots between the myelin

15. Neuron Function Classification
Sensory neurons: input neurons, unipolar
Motor neurons: output neurons, multipolar
Interneurons: carry information between neurons, bipolar

16. Glial Cell Types in CNS:
Astrocytes: metabolic and structural support
Microglia: remove debris
Ependymal cells: cover the lining of cavities
Oligodendrocytes: make myelin

17. Glial Cell Types in PNS:
Schwann cells: make myelin
Satellite cells: support cells