Can you stand the heat/Cells in action. Oct 10. Class website and remind 101. Jnewhouse.weebly.com. Body systems and molecules that are maintained by homeostasis.
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Control = __________________________
Label cups with Group # , then A, B or C
Wash egg and place it on the paper towel in the bin.
At the weigh station, tare the weight of the cup and place egg into the cup. Record the mass in grams.
DO NOT REMOVE THE EGG FROM THE CUP
Fill the cup with the appropriate liquid, just to cover
Cup A – Water Cup B – Corn Syrup Cup C – Vinegar
Place them on the back round table
( Final Mass – Initial Mass)
X 100 = Percent Change
Record qualitative/descriptive observations
Record your final mass (take egg out of the cup and dispose of liquid)
Make final qualitative descriptive observations of your eggs
Calculate the percent change:
Enter your data into the class data table
What changes did you find, if any, in the internal environment of your eggs? Explain your answer by using specific evidence from your observations.
How would you explain any differences that you noticed in the behavior of the 3 eggs under different external conditions?
Why is it helpful to combine data from the entire class?
Define isotonic, hypertonic and hypotonic
How do isotonic, hypertonic, and hypotonic solutions affect plant cells?
Hypertonic- Shrink – the cell membrane releases from the cell wall
Hypotonic – Turgor Pressure
Isotonic – Flaccid – wilting plant
The environment inside is the same as the environment outside.
Water moves through the cell equally in both directions
The concentration of solutes outside the cell is greater than inside
Water leaves the cell
The cell shrivels or shrinks
The concentration of solutes outside the cell is less than inside.
Water rushes inside the cell
The cell swells and bursts/ lyses