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…

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One of 3 (at left)is missing or not explained Excellent Good Needs improvement Missing Survival behavior 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 addressed If chose CASE STUDY Subject Person used for case study is ideal candidate, and you clearly explain why. Person used for case study is a reasonable candidate, and you explain why Person used may be good candidate, and/or you only partially justify your choice Data gathering methods You clearly explain at least 3 different approaches you’d use to gather data from this person You partially explain/2 approaches You poorly explain/1 or 2 approaches Advantages of this approach You clearly discuss why a case study would give you insight into this survival behavior Partial Poor Disadvantages of this approach You clearly discuss the limitations of a case study in understanding this behavior If chose OBSERVATION (field or lab) Location You clearly describe the location and explain why it is ideal for observation. You describe at least 2 behaviors you would be looking for during observation. Advantages You explain 2 advantages of this approach. Disadvantages You describe 2 limitations of this approach. If chose SURVEY Type of survey You clearly address how you would obtain survey participants and who they are You include 5 sample questions (not open ended) that would be in your survey. You address 2 advantages of conducting a survey. You address 2 challenges to conducting a fair and representative survey If chose CONTROLLED EXPERIMENT Experimental question You define a clear research question can establish cause and effect between two variables. Set up You show your design including hypothesis, IV, constants, DV. Advantage You address two advantages of this approach. Disadvantage You address two limitations of this approach.

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.

Make the following table: Do 10 trials with each hand. LEFT HAND RIGHT HAND 1 2 3 4 5 6 7 8 9 10 AVG (cm) Data/Observations. Make the following table: Do 10 trials with each hand. Calculate average by adding numbers and diving by 10. Repeat for each person.

Class data Name Left hand (average cm) Right hand (average cm) 1 2 3 4 5 6 7 8 9

Analysis: Which person had the fastest hands? On average, which of hand is the quickest? 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. Name two other variables that might have played a role in how fast your reaction time was in this lab. 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? 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? 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!