1. Investigate the distribution of heat receptors in your partner's skin. To do this, follow these steps:
a. Mark a square with 2.5 cm sides on your partner's palm.
b. Prepare a grid by dividing the square into smaller squares, 0.5 cm on a side.
c. Have your partner rest the marked palm on the table and close his or her eyes.
d. Heat a blunt metal probe by placing it in a beaker of hot water (about 40-45°C/104-113°F) for a minute or so. (Be sure the probe does not get so hot that it burns the skin.) Use a thermometer to monitor the appropriate warm water from the tap or the water bath.
e. Wipe the probe dry and touch it to the skin on some part of the grid.
f. Ask your partner to report if the probe feels hot. Then record the results in Part D of the laboratory report.
g. Keep the probe hot, and repeat the procedure until you have randomly tested twenty-five different locations on the grid.
2. Investigate the distribution of cold receptors by repeating the procedure. Use a blunt metal probe that has been cooled by placing it in ice water for a minute or so. Record the results in Part D of the laboratory report.
3. Answer the questions in Part D of the laboratory report.
Was this article helpful?
This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.