Biology unit 1&2 chapter 3 answers Essay

There must be a higher(prenominal) concentration of wastes in the dialysis tube than in the surroundings. Wastes must therefore be constantly removed from the surroundings to maintain a concentration gradient.b) What modified features does it have?If the surrounding solution was not changed, the concentration gradient would establish smaller and smaller until diffusion would no longer occur and the self aforementioned(prenominal)(prenominal) amount of wastes would leave the dialysis tubing as wound enter it. 2.3. When epithelial stalls such as human cheek cells, ar studied downstairs a microscope, they are mounted on a slide to which a drop of normal saline (salt) solution, rather than tap water, has been added. Explain why this is the best method for preparing these cells.If the person drank the sea water, cells in digestive clay would be surrounded by a hypotonic solution and would lapse water. Cells would become dehydrated and cease to function.4. Under what natural condit ions might kit and caboodle cells become plasmolysis?There will be a net political campaign of water into the Amoeba in freshwater environment.5. Two cells have the same internal concentration of chicken feed solution. They are both placed in distilled water. Even though both cells expand over time, one expands red-hot than the other. What are some reasons for this observation?The disease will cause hard diarrhea. Human body will be infected with bacterium when tipsiness contaminated water, and sticks to the enteral lining. . Intestinal cells start secreting sodium and chloride ions into theintestinal fluid. This upsets the equilibrise of fluids, causing a net movement of water out of the intestinal cells into the surrounding fluid which is then excreted with faces, causing diarrhea. Dehydration of body cells may eventually kill infected people.6. After eating a piece of ground of slated potato chips your lips often feel dry. Explain why?Blood glucose aims are measured i n mill moles of glucose per liter of blood (mmol/L). The normal level is around 5 mmol/L. A 5% solution of glucose is roughly kindred to the normal level of glucose in the blood. If this concentration drastically increases (20%), body cells may be in danger of losing water by osmosis. Increased smart and excessive urination are two of the symptoms of diabetes, a condition in which the amount of blood sugar rises to unacceptable levels.7. A student places a sustainment cell into a drop of liquid contains less than 5% sugar. a) Make a hypothesis to explain what caused the change in sugar concentration outside the living cell. It is hypothesis a living cell being placed into a drop of liquid contains less than 5% sugar can cause the sugar concentration outside the living cell.8. A particle that has been drawn into a cell by phagocytosis is not truly inside the cell. Explain the statement.If salt levels rise, water tends to move from the substructure tissue in citrus trees to the su rroundings by osmosis. There is a lack of water for photosynthesis, causing smaller yields of citrus fruit.