Plant Cells When plant cells are in a hypotonic solution, such as fresh water, t
ID: 196437 • Letter: P
Question
Plant Cells When plant cells are in a hypotonic solution, such as fresh water, the large central vacuole gains water and exerts pressure, called turgor pressure. The cytoplasm, inclading the chloroplasts, is pushed up agains When plant cells are in a bypertonic solation, such as 105% NaCT, the central vacuole loses water cysyplasm, inchading the chloroplasts, pulls away from the cell wall. This is called plasmolysls. You will observe the cell wall You observed turgor pressure in Figure 4.4 Expenimental Procedure: Tonicity in Elodoa Cells I. if possible, use the Elodea slide you prepared earlier in this laboratory. If not, prepare a new wet mount of a small Elodee leaf using fresh water. Your slide should look like Figure 4.4. 2. Complese the portion of Table 4.5 that pertains to a hypotonic solution. mare a new wet mnt of a small Eleda leaf using a10% NaCl solution. contents are now in the center in most cells because the cytoplasm has puiled away from the cell wall due to loss of water from the large central vacuole 4 Afher several minute, focus on the surface of the cells. Note that plasmolysis has occurred, and the cell S. Complete the portion of Table 4.5 that pertains to a hypertonic solution Plasmolysis is visible in most cells Table 4.5 Tonicity Hyposonic Effect of Tonicity on Elodea Cells Appearance of Cells Due to (Scientific Term) 2 Labortory 4 Call Stucture and FunctionExplanation / Answer
Answer:
Effect of tonicity on Elodea cells:
Turgor pressure and plasmolysis in plant cells:
Turgor pressure develops when solutes( water) move into a plant cell in hypotonic medium. This turgor pressure is lost once the cell is placed in a hypertonic solution which leads to plasmolysis giving them a shrunken appearance.
Tonicity Appearance of cells Due to Hypotonic The large vacuoles appear swollen due to gain of water and the chloroplasts in these are seen against the wall Turgor Pressure Hypertonic Vacuoles lose water, cytoplasm and chloroplasts are seen to be pulled away from the cell wall giving a shrunken appearance. Plasmolysis