#Hot# What exactly is in plant cells?
Experimental preparation:
Paper, scissors, glue, toothpicks, 1 shoe box lid (not too big), plasticine of different colors, watercolor pen
Experimental procedure:
1: Cut the paper into 9 small pieces (each 2 cm wide and 6 cm long).
2. Glue one side of the small piece of paper to the toothpick and make it into the shape of a small flag.
3: Spread about 1 cm thick plasticine in the lid of the shoe box.
4, adjust the shape of the plasticine, the surrounding high, the middle low, that is, in the middle of the formation of a depression.
5. Use different colors of plasticine to knead into circles, ovoids, bars, etc., and place them on the plasticine in the lid of the shoe box, and the placement position is as shown in the picture.
6, the shoe box lid is equivalent to the outer wall of the cell, the inner layer of plasticine on the inside of the lid is equivalent to a layer of cell membrane, write "cell wall" and "cell membrane" on the small flag, and then insert the small flag in the corresponding position.
7. Write other conceptual names that describe the structure on the remaining small flags, such as cytoplasm, vacuole, etc.
8. Now, insert the small flag with the name written on the corresponding plasticine.
Experimental results:
Now, a model of a plant cell is ready, and the cell components (organelles) in it are all available. These small cellular components perform their respective functions in the cell, like the organs in our bodies (such as lungs, kidneys), and their role runs through the entire growth process of the plant (e.g., germination, panicle extraction, flowering).
After placing the plant cells under a light microscope and zooming in several times, we can find that the inside of the cell is filled with liquid (cytoplasm), and the small parts in the cell are floating in the liquid. Organelles in plant cells have their own roles:
1. Cell membrane: Wraps various substances within the cell, making it a whole, and controls the entry and exit of substances into and out of the cell.
2. Cell wall: A layer of outer wall formed on the periphery of the cell plays a protective role and can enhance the stability of the cell.
3. Cytoplasm: The liquid in the cell, most of which is water (80%-85%) and protein (10
%—15%）
4. Vacuole: A space enclosed by a thin membrane in the cell, containing liquid, has the function of storage and detoxification, and can maintain the pressure inside the cell.
5. Nucleus: Controls the activity of cells, and genetic material is stored in the nucleus with chromosomes as the carrier.
6. Mitochondria: the "energy supply station" of the cell. Here the cells breathe aerobically, release energy, and store nutrients.
7. Ribosomes: the protein "processing plant" of the cell.
8. Endoplasmic reticulum: composed of some tubular cavities: these tubular cavities are wrapped in a thin film. The main transport of chemicals, especially proteins, plays a very important role in the division of cells.
9. Golgi body: classified transport proteins. 10. Chloroplasts: the chlorophyll contained can react with sunlight, participate in photosynthesis (see Experiment 6), and produce nutrients (sugars) needed by plants. (from 101 magical experiments) #Hotspot # #植物细胞 #
