Cells Diveristy and Uniformity
Biology 211 Lab section 14
New Mexico State University
Elodea Wet Mount
If cytoplasmic screening is occurring, you will see the chloroplast circulating around the cell. Cytoplasmic streaming is controlled by microfilaments in the cell’s cytoskeleton. These filaments of actin and myosin move cellular contents in an active process that uses energy released by breaking ATP down in ADP. How might a cell benefit by spending energy to circulate the cytoplasm? Cytoplasm in a cell is responsible for cell growth, reproduction, metabolism, and eliminating waste. If the cytoplasm is circulating then the cell is able to be more efficiently functioning on its turnover rate. As a result the chloroplasts move around more, and therefore more ATP can be produced. Leaf Epidermal Peel
How could a cell regulate the movement of carbon dioxide, oxygen, and water vapor into and out the leaf? How would the plant benefit by influencing the movement of these molecules? The cell is able to regulate the movement of CO2, H2O, and water vapor in and out of the leaf because of the stomata. A stoma is what has the guard cells, and those are responsible for adjusting the opening and closing in the gaps between them. These are the only cells that contain chloroplasts, and can carry out photosynthesis that is “the process that converts energy from the sun into chemical energy” (Preszler et al, 2014). The plant therefore benefits from the movement of these molecules by controlling the reservation of its moisture.
Can you see the ink moving into the cells? Is it enclosed within the vacuoles? What are the distributions of the ink and carmine food vacuoles in each cell? How many food vacuoles of each type are in each cell? I did not actually see the ink “moving” into the cells, however it was extremely noticeable that once it did “move” the location of it was inside the vacuoles of
References: Preszler, R.W., L.L. Haas, A.L. Marion, and L.J. Urquidi. 2014. Cellular and Organismal Biology. 10th edition. Hayden McNeil, MI.