1. Chapter 7
The Nervous System

2. Warm-up
Tell me anything you know about the nervous system. What does it consist of? What does it do?

4. Structures to label Cell body(soma) Axon Hillock Axon Axon Terminal
Dendrites
Myelin Sheath
Nodes of Ranvier

7. Nervous tissue: neurons
Cell body
Nucleus
Large nucleolus

8. Nervous tissue: neurons
Processes outside cell body
Dendrites—conduct impulses toward the cell body
Axons—conduct impulses away from the cell body

9. Functions of the Nervous System

10. Structural Classification
Central nervous system (CNS)
Brain
Spinal cord
Peripheral nervous system (PNS)
Nerves outside the brain and spinal cord

11. Functional Classification
Sensory (afferent) division
Nerve fibers that carry information to CNS
Motor (efferent) division
Nerve fibers that carry impulses away from CNS

12. Functional Classification

13. Organization of nervous system

14. Motor (efferent) division
Two subdivisions
Somatic nervous system = voluntary
Autonomic nervous system = involuntary

15. Nervous Tissue: Glial/Support Cells
Support, insulate, and protect neurons

16. Astrocytes

17. Astrocytes

18. Microglia

19. Microglia

20. Ependymal cells

21. Ependymal cells

22. Oligodendrocytes

23. Oligodendrocytes

24. Glial Cells of the PNS
Satellite cells
Schwann cells

28. Nervous tissue: neurons
Axonal terminals are separated from the next neuron by a gap
Synaptic cleft—
Synapse—

29. Multipolar Neurons

31. Bipolar Neurons

32. Unipolar Neurons

34. Patellar Reflex

35. Patellar Reflex

36. How fast does your brain react?

39. How Fast Your Brain Reacts to Stimuli:
On the back of lab page you must include:
Average of group measurement for visual, auditory and tactile (part 1)
Use the formula to calculate your reaction time and average group reaction time for each stimuli
Which stimuli did you personally react fastest to?
Which stimuli did your group as a whole react fastest to?