
Human Physiology: From Cells to Systems (MindTap Course List)
9th Edition
ISBN: 9781285866932
Author: Lauralee Sherwood
Publisher: Cengage Learning
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Transcribed Image Text:**Title: Observing Paramecia and Amoeba**
**Drawing of Amoeba**
- The image features a hand-drawn illustration of an amoeba, showcasing its irregular shape with protruding pseudopods.
**Text Details:**
*Paramecium* — Paramecia are quite large, straw-colored, slipper-shaped, and move rapidly, making them very noticeable. If there are Paramecia in your field of view, you will likely recognize them immediately. Students often have trouble both finding a Paramecium and then slowing it down enough to study under high magnification. The key to finding a Paramecium is to scan the entire slide quickly using the scanning lens. If none are visible, create a new slide and search again.
Paramecia tend to move to the edges of the coverslip and can even "escape" the coverslip at its edges. To slow down the Paramecia, mix a drop of methyl cellulose with a drop of the cell culture, as done with *Euglena*.
**Procedure:**
1. Transfer a drop of Paramecium culture to a clean slide and add a coverslip carefully to avoid trapping air bubbles.
2. Use the scanning lens to locate one or more cells.
3. Center a Paramecium in the field of view and quickly switch to low power. With practice, you can maintain the Paramecium in view.
4. Observe the rapid movement and characteristic spiraling in water. Note the behavior over time, particularly when encountering obstacles like debris from the culture medium.
What happens when a cell encounters an obstacle? (Space for observation notes)
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This content is suitable for an educational website, providing detailed instructions and observations for studying microscopic organisms.
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