1. Structure & Function of the Nervous System
Biology 9: Moretti & Dickson

2. Bio 9B: Monday, January 17, 2011 Title: No Class – MLK Day
Homework:
Do Now:
Today’s Objectives:

3. Bio 9C: Tuesday, January 17, 2011 Title: Structure & Function of Nerve Cells
Homework:
Complete Pre-Lab for Reaction Time Lab
Review the complete set of procedures before the start of tomorrow’s class.
Do Now:
Complete the Cell Specialization Do Now
Today’s Objectives:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body
Identify the 2 major divisions of the Nervous System and their major components

4. Agenda
Cell Specialization Do Now
Nervous System Notes – Day 1

5. Investigate Cell Specialization Specialized Cells have Specialized Structures
“Typical” Cell
“Mystery” Cell
Objectives for Class:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons that allow them to receive and transmit signals throughout the body

6. Agenda
Nervous System Notes – Day 1

7. Neurons: Structure and Function
Objectives for Class:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

8. Neurons Neuron = a specialized nerve cell
Function: communicate with body organs by sending electrical signals (impulses)
Structure:
Long branches send and
receive signals
Cell body coordinates
incoming and outgoing signals

9. Neurons: Structure and Function
Dendrites: branched extensions, carry impulses toward cell body
Cell Body:
nucleus & organelles
Axon: Takes impulses away
from cell body
Objectives for Class:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

10. Neurons: Structure and Function
Axon
Cell Body
Dendrites
Objectives for Class:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

11. Nervous System: The 2 Major Divisions
Central Nervous System
Brain and spinal cord
Brain: Processes information and controls responses
Spinal cord: Links brain to other nerves and controls reflex responses.
Peripheral Nervous System
All other nerves throughout the body
Motor Neurons send info from brain to muscles
Sensory Neurons send info from sense organs to brain
Image: Adam, Inc.;
Objectives for Class:
Identify the 2 major divisions of the Nervous System and their major components

12. Nervous System: Major Divisions Working Together
Objectives for Class:
Identify the 2 major divisions of the Nervous System and their major components

13. Bio 9C: Wednesday, January 19, 2011 Title: Reaction Time Lab
Homework:
Complete Post-Lab Conclusions
Draft the “Final Assessment” on a separate sheet of paper for Thursday
Do Now:
Take out the Reaction Time Lab and wait for your next instruction
Today’s Objectives:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

14. Lab: Testing the Reaction Time of Different Muscle Groups
Abstract:
When a glass drops from a table and shatters, you turn your head to see what happened. This is just one example of how your nervous system senses and responds to stimuli. In this lab, we will test how fast you can react to various stimuli.
First, I’ll need a volunteer with cat-like reflexes for a quick demonstration. Then, you’ll test the reaction time of different muscle groups (fingers vs. arms) by measuring how far a meter stick falls before you can catch it.
Demo
Complete Pre-lab
Part I – Measuring Reaction Time of Finger Muscles
Complete Lab and Record Data
Part II – Measuring Reaction Time of Arm Muscles
Objectives for Class:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

15. Chicken Wing Dissection
Aaron
Asarel
Jhon
Christine
Meryam
Brunyr
Julian
Karen
Crystal
Joe
Anthony
Marcus
Rockens
Jamesly
Marie
Garlyn
Lilliana
Kendra
Obayanna
Carla
Amando
Amanjot
Jason
Jonathan

16. Reaction Time Lab: Class Averages
Group Name
Finger Reaction Time (cm)
Arm Reaction Time (cm)
Karen & C-Cat
12.7cm
14.1cm
Obayanna & Carla <3
12.7
23.4 ;)
Anthony & Marcus
18.92cm
19.4
Christine + Meryem
14 cm
19.4 cm
Julian and Joey
12.2cm
12.5cm
Kendra and lilliana
14.8
17.9
Garlyn+Marie+Aseral
15.4
24.13
Amanjot and amando
21.5
Jamesly and Rockens
12.1
5.8
Class Average
14.5
17.6

17. Bio 9C: Thursday, January 20, 2011 Title: Nerve Impulses
Double Block
Homework:
Complete the Final Assessment – to be counted as a quiz grade!
Do Now:
What is the difference between a dendrite and an axon?
How do they relate to the overall function of a neuron?
Today’s Objectives:
Identify the 2 major divisions of the Nervous System and their major components
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

18. Agenda Notes: Nerve Impulses
Complete the Final Assessment of the Reaction Time Lab (this will count as a Quiz Grade!)

19. Neurons: Structure and Function
Dendrites: branched extensions, carry impulses toward cell body
Cell Body:
nucleus & organelles
Axon: Takes impulses away
from cell body
Objectives for Class:
Describe how different types of cells have different structures to fit their functions
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

20. Nerve Impulse: A “wave” of electricity that travels through the neuron
3 Steps of a Nerve Impulse:
Dendrites are stimulated by a stimulus (environment or other neuron).
Electric impulse travels to cell body.
Cell body sends an impulse down the axon to the axon terminals.
Stimulus!
(Sound, smell, sight, taste, another neuron’s signal)
Objectives for Class:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

21. The “wave” of a nerve impulse
Objectives for Class:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

22. Neurons communicate with other cells
Other neurons
Synapse:
The place where a neuron connects to another cell
Motor neuron
Muscle cell

23. Communication At the Synapse
Axon terminal releases neurotransmitter (a tiny signal molecule).
Neurotransmitter diffuses across synapse and signals the next cell.
This triggers an impulse in the next cell.
Objectives for Class:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

24. Communication w/ Muscle Cells
Objectives for Class:
Identify 3 specialized structures of neurons and explain that allow them to receive and transmit signals throughout the body

25. Agenda
Complete the Final Assessment of the Reaction Time Lab (this will count as a Quiz Grade!)

26. Final Assessment
Use this period to Complete the “Final Assessment” for the Reaction Lab