Inquiry 9/18 and 9/21

Please prepare for a warm-up!

Have your Semmelweis flowchart and q’s ready

for stamping

Warm-Up 9/18 and 9/21

• List 10 diseases that you know of.

• Next to each one, write if it is caused by bacteria (B) or virus (V).

Learning Targets

• I can explain how an experiment can be both systematic and non-linear.

• I understand the different causes, prevention, and treatments of bacterial and viral diseases.

• I can read scientific articles with skepticism and properly question the validity of the findings.

Semmelweis Flowchart

• Check your flowchart with mine and make changes, if needed

• Discuss the two questions with your group and be prepared to share:

Then, explain why is it both systematic and non-linear, using events/evidence from the article. (3-4 sentences)

Add to your answer! See the T-chart on the board.

Viruses

Your friend, the

flu

VIRUSES

• Organisms that bridge between living and non-living things.

• Composed of: a capsid (outer coating made of protein) and DNA or RNA

Why are viruses considered ‘not alive’?

• No nucleus, cytoplasm, organelles or cell membrane

• Cannot reproduce through binary fission or mitosis

• They are not cells; they are parasites

• No control of movement outside cells

Shapes of Viruses

A Viral Variation

• PrionsPrions – glycoprotein; Mad Cow Disease- causes Creutzfeldt Jakob Disease in humans.

Reproduction of Viruses

• Lytic cycleLytic cycle – virulent strains; cycle occurs in 5 phases (1-2 days)

• The virus enters a cell, makes copies of itself and causes the cell to burst.

The Flu and The Cold

Reproduction (con’t.)• Lysogenic cycleLysogenic cycle – may be dormant for months or years

• The virus injects its DNA into the DNA of the host cell, and when DNA is copied, a copy of the viral DNA is also made.

• Ex: herpes (genital or oral)

Lysogenic and Lytic Cycles

Prevention of Viruses

• Vaccines are made of genetically weakened strains of the virus.

• Vaccines prompt the immune system to create antibodies to fight viruses

West Nile Virus Vaccine

Treatment of Viruses

• Antibiotics DO NOT work. Viruses don’t have a cell wall for antibiotics to break down.

• There are some “anti-viral” drugs that can help to fight viruses.

• Most of the time there is nothing that will help you kill of the virus. It is up to your immune system to do the work.

Examples of Viruses

• Chicken Pox• Small Pox• Ebola• Flu• HIV• Hepatitis (A,B,C,etc)• Cold• Herpes I & II• Measles, mumps, rubella HIV budding off from a

human cell

Bacteria and Virus Comparison Chart

• Using your notes, complete the comparison chart. It will be an important tool in reviewing for next week’s test (Thurs/Fri).

Short Break!

• Please log in to a computer and find my website!

Google Hardtke and Tahoma

Learning Targets

• I can explain how an experiment can be both systematic and non-linear.

• I understand the different causes, prevention, and treatments of bacterial and viral diseases.

• I can read scientific articles with skepticism and properly question the validity of the findings.

Valid vs. Deceptive Assignment

• On the online links page of my website, choose one of the three articles to read

• Then, come up with 10 questions for the researcher to uncover how valid the claims in the article are. DO THIS ON THE BACK OF YOUR CHART.

• HW: Choose the best 5 questions. What are high quality answers to those questions that would make you think the results are valid?