Transcript ruler drop activity PP

Mouse party and Meth project –
Key concepts
• Drugs/medicines are chemicals that alter
our experience by….
• An AGONIST is a drug that…
• An ANTAGONIST is a drug that…
• Some drugs are addictive because…
• What makes different neurotransmitters
have different effects on our experience?
• Drugs such as methamphetamine are
detrimental to our health because they…
Paper Back and Sign up
• If you’re not happy with your grade, you
may rewrite the paper.
• You must first review the rubric and see
where you lost points.
• Sign up for a time to see me and discuss
changes.
• Once I approve you may rewrite paper and
turn in to be re-graded.
Survival behavior
Subject
Data gathering methods
Advantages of this approach
Disadvantages of this
approach
Location
Data gathering methods
Advantages
Disadvantages
Type of survey
Data gathering methods
Advantages
Disadvantages
Excellent
Good
Needs improvement
Missing
Behavior is specific, observable and
measurable here in Davinci community.
One of 3 (at left)is missing or
not explained
Two of 3 are missing or not
explained
Survival
behavior
is not
addresse
d
Person used may be good
candidate, and/or you only
partially justify your choice
Missing
You poorly explain/1 or 2
approaches
Missing
Poor
Missing
Poor
Missing
Poor
Missing
Poor
Missing
Poor
Poor
Missing
Missing
Poor
Missing
Poor
Missing
Poor
Missing
Poor
Missing
If chose CASE STUDY
Person used for case study is ideal candidate, Person used for case study is a
and you clearly explain why.
reasonable candidate, and you
explain why
You clearly explain at least 3 different
You partially explain/2
approaches you’d use to gather data from this approaches
person
You clearly discuss why a case study would
Partial
give you insight into this survival behavior
You clearly discuss the limitations of a case
Partial
study in understanding this behavior
If chose OBSERVATION (field or lab)
You clearly describe the location and explain
Partial
why it is ideal for observation.
You describe at least 2 behaviors you would
Partial
be looking for during observation.
You explain 2 advantages of this approach.
Partial
You describe 2 limitations of this approach.
Partial
If chose SURVEY
You clearly address how you would obtain
Partial
survey participants and who they are
You include 5 sample questions (not open
Partial
ended) that would be in your survey.
You address 2 advantages of conducting a
Partial
survey.
You address 2 challenges to conducting a fair Partial
and representative survey
The PNS
• Takes in information from external
environment using sense organs
• Sends to SENSORY CORTEX of brain for
processing
• MOTOR CORTEX of brain decides on an
action.
• Sends instruction to muscles to carry out
action.
Interneurons
• Connect:
–PNS with CNS
–Within PNS, sensory neurons
(afferent) with motor neurons
(efferent)
PNS Activity
Objective: How can I measure the speed of my PNS?
What affects my reaction time?
Hypothesis:
Procedures: Pair up. Person #1 holds ruler vertically
with the 30 cm mark at top. Zero cm is at bottom.
Person #2 has fingers poised aver zero cm mark at
bottom.
Person #1 drops the ruler without telling person #2
when they will do it.
Person #2 grabs ruler when they see it drop.
Data/Observations.
Make the following table:
Do 10 trials with each
hand.
TRIAL #
1
2
3
Calculate average by
adding numbers and diving
by 10.
4
5
Repeat for each person.
6
7
8
9
10
AVG (cm)
LEFT HAND
RIGHT HAND
Class data
Name
1
2
3
4
5
6
7
8
9
Left hand (average
cm)
Right hand
(average cm)
Analysis:
1. Which person had the fastest hands?
2. On average, which of hand is the quickest?
3. Why do you think there is a "delay" from the time you see the ruler drop to the time your hand
catches the ruler? Describe the pathway of neural communication from sensory organ to
muscle.
4. Name two other variables that might have played a role in how fast your reaction time was in
this lab.
5. What do you think would happen if your partner asked you a question while they dropped the
ruler? Try it for 5 trials. Why do you think this makes a difference?
6. Do the experiment by yourself, using one of your hands to drop and the other to catch the
ruler. How were your results different? Why do you think this is so?
7. Draw a bar graph comparing the average times of the fastest hand for each person at the
table.
How to calcuate reaction time
Let’s say it dropped on average 8 cm. You have to convert that
to meters so divide by 100.
8 cm
------- = .08 m
100
Use the formula:
speed = distance / time
We will use the rounded up number of 10 m/s for gravity’s
speed
.08 m
10 m/s = -------now solve for t
t
.08
------ = .008 sec
10
This is how long it took you to
see the ruler drop, react, and
catch the ruler.
Today’s Key Concepts
• Sense organ (eye, ear, taste buds etc)
• Sensory neurons (afferent neurons)
• Interneuron (connect PNS and CNS and
sensory neurons with motor neurons)
• Motor neuron (efferent neurons)
• Sensory and motor cortexes of CNS.
• Muscle (Effector. Ex: hand)
• Somatic and autonomic divisions of PNS
HOMEWORK
• Think about a time in your life when you
have been really scared.
• You don’t need to share it with the class,
but you must be willing to write about it
next class (privately).
• Write a short paragraph about it. Bring in.
• WE CANT DO OUR ACTIVITY NEXT
CLASS WITHOUT IT!