29.5 Brain Function and Chemistry Set up Cornell Notes on pg. 39

•Topic: 29.5 Brain Function and Chemistry

•Essential Question(s):

1.In a paragraph, summarize how your chosen drug effect the nervous system.

2.1 Atoms, Ions, and Molecules

29.5 Brain Function and Chemistry

KEY CONCEPT Scientists study the functions and chemistry of the brain.

29.5 Brain Function and Chemistry

2

Clinical Application 10.5

1.Cocaine was originally introduced for what purpose?

2.LSD was originally used for what purpose?

3.The effect of a drug depends on what 3 things?

4.What happens with repeated use of an addictive substance?

Clinical Application 10.4

1.What do opiates do to the body?

2.What are endorphins?

3.Why does the human body make their own opiates?

4.Why do people have withdrawal symptoms when they stop taking a drug?

Taped on Pg. 38

29.5 Brain Function and Chemistry

Neurons (nerve cells) are cells that can store information and send and receive messages.

On the top ½ of p. 38 write a paragraph, hypothesizing how drug or alcohol use might affect the nervous system?

Points to Ponder

29.5 Brain Function and Chemistry

KEY CONCEPT Scientists study the functions and chemistry of the brain.

29.5 Brain Function and Chemistry

Disclaimer:•We will be spending the next couple of days learning about the effects of certain drugs on the nervous system

•We need to approach this topic in a mature manner– You may share family/news stories about abuse of drugs

(please no clear identification)– You MAY NOT share any personal stories at any time

29.5 Brain Function and Chemistry

New techniques improve our understanding of the brain.

• Today, scientists study the brain without surgery.

29.5 Brain Function and Chemistry

Changes in brain chemistry can cause illness.

• Different neurotransmitters (chemicals) relate to different functions in different areas of the brain..

When your brain produces the correct amount of these neurotransmitters, homeostasis is maintained–some stimulate impulses, some prevent impulses

synapse

Normal

neurotransmitter

receptor

29.5 Brain Function and Chemistry

• Abnormal levels of neurotransmitter can cause illness.

– Schizophrenia: A brain disorder in which people interpret reality abnormally

– Depression: A mood disorder causing a persistent feeling of sadness and loss of interest

NormalSchizophrenic

Depressedgreen= low levels of activity

Red = are the most active

29.5 Brain Function and Chemistry

Drugs alter brain chemistry.

• Addiction – is the physiological need for a

substance.

• Tolerance – occurs when more drug is needed

to produce an effect.

29.5 Brain Function and Chemistry

10

Drug Addiction

• Occurs because of the complex interaction of neurons, drugs, and individual behaviors

• Understanding how neurotransmitters fit receptors can help explain the actions of certain drugs

• Different drugs have different mechanisms of action

• Several questions remain about the biological effects of addiction, such as why some individuals become addicted and others do not

29.5 Brain Function and Chemistry

• Stimulants cause more action potentials (electrical impulse)– may increase neurotransmitter (chemicals) in synapse– Happy, energetic, alert “uppers”– Increase mental or physical functions

cocaine

neurotransmitter

synapse

Ex: SpeedCocaineCaffeine NicotineMDMA ecstasy Methamphetamine

29.5 Brain Function and Chemistry

• Depressants cause fewer action potentials (electrical impulses)– may produce neurotransmitter that prevent impulses – Relaxed, tired “downers”– Decrease mental and physical functions

Ex:AlcoholMarijuanaMorphineHeroin

29.5 Brain Function and Chemistry

Teenagers Against Drugs Campaign Posters and Essay

13

• Alcohol• Ecstasy (MDMA, Molly, E)• Heroin• LSD (Acid)• Cocaine (Coke)• Methamphetamine (Meth)

• Tomorrow you will gather information about your chosen drug and identify its effects on the nervous system.

• Using this information you will create a poster designed to encourage teenagers to AVOID the drug AS WELL AS write an informational essay about the effects of your drug on the nervous system

•Bath Salts•Inhalants•Rohypnol (Roofies)•Phencyclidine (PCP)•Marijuana (Weed)

29.5 Brain Function and Chemistry

14

“Excessive Drinking is Dangerous”

29.5 Brain Function and Chemistry

15

29.5 Brain Function and Chemistry

Drug Essay DUE: WED FEB 25

16

Section 1: (7 pts)•Introduce your drug•What was your drug originally used for in the medical field or what was it developed for?•Any background information of the drug and its rise to popularity (facts/statistics/etc..)

Section 2: (14 pts)•Explain your drug’s effect on the nervous system specifically!

• How does it effect motor skills or connections between neurons?• How does a person “feel” on your drug? What drives them to use?• What are the short term AND long term consequences of using/abusing the drug?

Section 3: (7 pts)•What are some “signs” that someone is abusing your drug?•What are some treatment options for a person who wants to become sober

• Rehab?• Therapy?• Medicine?

•Please tell us about some support groups available for your drug (Ex: Alcoholics Anonymous )

Section 4: (7 pts)•Find a news article regarding a crime committed while someone was using your drug•Explain what happened in your own words, and what the consequences to the person/or other people were•Print out a copy of the article/video, AND attach the web address to the bottom of your essay (Some newspapers: LA Times/Chicago Tribune/OC Register/ NY Times/Huffington Post.)

29.5 Brain Function and Chemistry

Body Story- The Beast Within (24m30s-49m)

• Take notes/comments/questions on the brain and neurons’ response to drugs and alcohol

Bottom of pg. 39– or if no room separate ½ sheet of paper

https://www.youtube.com/watch?v=fRGDrP0OuRs