Diagram Of Composite Cell

1. Review a textbook section on a composite cell.

2. Observe the animal cell model and identify its major parts.

3. As a review activity, label figure 4.1 and study figure 4.2.

4. Complete Part A of Laboratory Report 4.

5. Prepare a wet mount of cells lining the inside of the cheek. To do this, follow these steps:

a. Gently scrape (force is not necessary and should be avoided) the inner lining of your cheek with the broad end of a flat toothpick.

b. Stir the toothpick in a drop of water on a clean microscope slide and dispose of the toothpick as directed by your instructor.

c. Cover the drop with a coverslip.

d. Observe the cheek cells by using the microscope. Compare your image with figure 4.3. To report what you observe, sketch a single cell in the space provided in Part B of the laboratory report.

6. Prepare a second wet mount of cheek cells, but this time add a drop of dilute methylene blue or iodine-potassium-iodide stain to the cells. Cover the liquid with a coverslip and observe the cells with the microscope. Add to your sketch any additional structures you observe in the stained cells.

Figure 4.1 Label the structures of this composite animal cell.

Figure Animal Cell Source Label
7

Figure 4.2 The structures of the cell membrane.

Extracellular side of membrane

Fibrous proteins

Fibrous proteins

Anatomy Fibrous Layers

Double layer of " phospholipid molecules

Cytoplasmic side of membrane

Cholesterol molecules

Phospholipid "tail"

Phospholipid ' "head"

Double layer of " phospholipid molecules

Cytoplasmic side of membrane

Cholesterol molecules

Phospholipid "tail"

Phospholipid ' "head"

Figure 4.3 Stained cell lining the inside of the cheek as viewed through the compound microscope using the high-power objective (400x).

Nucleus

Figure 4.3 Stained cell lining the inside of the cheek as viewed through the compound microscope using the high-power objective (400x).

Nucleus

Single Cheek Cell 400x

Cell membrane

Folds of the cell membrane

Cytoplasm

Cell membrane

Folds of the cell membrane

Cytoplasm

7. Answer the questions in Part B of the laboratory observe, sketch a single cell of each type in the report. space provided in Part C of the laboratory report.

8. Observe each of the prepared slides of human 9. Answer the questions in Part C of the laboratory tissues using the microscope. To report what you repĀ°rt.

Essentials of Human Physiology

Essentials of Human Physiology

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.

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