1. Do now activity #2
Based on Unit 1 vocabulary, what factors in an experiment do not change?
Based on Unit 1 vocabulary, what is a macromolecule that is made up of fats?
Based on Unit 1 vocabulary, what is the basic unit of living?
Based on Unit 1 vocabulary, what contains DNA?
Based on Unit 1 vocabulary, what organelle makes proteins?

2. Section 4-4: homeostasis
Essential Question:
If you were given the task to examine a deceased patient, how could you determine that they are no longer maintaining homeostasis?
Section 4-4: homeostasis
Learning Target
Identify signs of life within a living and non-living things.

3. announcements Biology Tutoring this week: Lunch B (Tuesday & Thursday)
7:00AM (Monday – Friday)
After school Biology Tutoring: Tuesday
You must sign up for retakes during Biology Tutoring. 7:00AM retakes only. Last day to retake Section 3 is 11/01/16.

4. Color Printer Paper = 10 Points
announcements
Available Extra Credit:
Tissue Box = 2 Points
Plastic Pencil Box = 5 Points
Color Printer Paper = 10 Points

5. Sickness is a type of imbalance that can cause an _____ to die.
overview
organism
Sickness is a type of imbalance that can cause an _____ to die.

6. imbalance
7 months – 4 years
Late 30s to early 40s
Mental and physical deterioration
Tay-sachs is a genetic disease that causes deterioration of nerve cells.

7. Cystic fibrosis is a genetic disorder that affects mainly the lungs.
imbalance
80% of death result from lung failure
Average lifespan is between 42 and 50 years
Cystic fibrosis is a genetic disorder that affects mainly the lungs.

8. Progeria is a genetic disorder that results in premature aging.
imbalance
Mid teens to early twenties
Progeria is a genetic disorder that results in premature aging.

9. death
The heart is no longer pumping and thus blood is not circulating, so gravity drags it down toward the ground, causing blood to pool at the lowest point of the body.
After a few hours, the body experiences red and purple discolouration from the settling blood.
By 12 hours after death, the body has reached maximum discolouration.
This process, known as ‘livor mortis’ helps coroners and forensic investigators determine the approximate time of death.
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Without the ____ beating, blood will pool to the lowest point; coagulation.

10. death
The first few hours
In the initial seconds after death, oxygen is quickly depleted and brain activity surges.
The neurons then cease operations, and the brain stops giving off hormones which regulate the different functions of the body, though some may carry on for a few minutes.
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Without ____ function hormones will stop sending signals that regulate homeostasis.

11. death
In the three to six hours after death, a phenomenon known as ‘rigor mortis’ begins to set in.
Cellular organelles deteriorate from the lack of energy, and leak calcium into muscle cells, which binds to protein and causes muscles to contract.
The muscles become stiff, leaving the body stuck in position for the next hours. 
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Rigor mortis (lactic acid build up) will take place after hours of death.

12. death
The days following death
While these other processes are occurring, the body (if it hasn’t been chemically embalmed or otherwise preserved) has slowly been undergoing decomposition the entire time.
Cells in the body accumulate without proper blood flow, causing a rise in carbon dioxide gas, and a rise in the pH of tissues.
This weakens the cell membrane and they burst, spewing cytosol.
Cytosol contains proteins and enzymes, which breaks down the surrounding tissue, along with the help of more than 100 trillion microorganisms.
Then, the anaerobic bacteria (that which doesn’t need oxygen to survive) in the gastrointestinal tract eats through the abdominal organs.
This is a smelly process, known as putrefaction, and the foul odours released by the breakdown of amino acids attracts insects including mites, carrion beetles, and blowflies.
Blowflies then lay eggs in the rotting tissue, which hatch within a day. 
The larvae – maggots – then eat the tissue until they mature.
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Decomposition begins & cytosol will be released from every cell causing a foul smell.

13.
reflected