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Osmosis Demonstration Lab Objectives The student will: 1) Observe the effects of different concentrations of salt solutions on potato cores. 2) Infer the relationship between weight loss and rate of osmosis. 3) Use a line graph to display data and draw conclusions. 4) Observe plasmolysis in Elodea. Background Osmosis is the process whereby water moves across a cell membrane by diffusion. Diffusion takes place when the molecules of a substance tend to move from areas of higher concentration

1 Responses to Static (Isometric) Exercise Suggestions for Teachers Background Static exercise involves the contraction of skeletal muscle without a change in muscle length, hence the alternative term, isometric (iso = same, meter = length) exercise. Static exercise produces a cardiovascular response that differs significantly from that observed during dynamic exercise. Typical examples of static exercise include athletic events such as weight lifting, shot put, hammer throw, and everyday

1 What Effects Does Exercise Have on You? Suggestions for Teachers Purpose To explore the responses of the heart and blood pressure to exercise Objectives 1) To learn how to take a pulse and blood pressure reading 2) To learn how heart rate responds to exercise 3) To learn how blood pressure responds to exercise Materials • 16" high bench or step • blood pressure cuff (sphygmomanometer) • stethoscope • Graph paper, poster board or overhead transparencies to make heart rate and blood

1 DNA Extraction from Fruit (Adapted from Isolation of DNA from Onion—Woodrow Wilson 1993) Loretta Loykasek, Burleson High School, Burleson, TX Purpose To allow students to observe the DNA found in plant cells. This activity may be used from elementary science to high school biology courses. Background All food you eat comes from plant or animal sources. All plants and animals are composed of cells, which have basically the same parts. The DNA is contained within the nucleus of the cell

Doctoral students in the Clinical Psychology Graduate Program at UT Southwestern experience 1,400 hours of training and supervision rotations.

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