Biology unit 1&2 chapter 3 answers Essay

at that place must be a higher tightfistedness of wastes in the dialysis tube than in the meets. Wastes must therefore be constantly upstage from the surroundings to maintain a concentration gradient.b) What special features does it have?If the surrounding solution was not changed, the concentration gradient would become smaller and smaller until diffusion would no longer occur and the same amount of wastes would reach the dialysis tubing as wound enter it. 2.3. When epithelial electric cells such as human cheek cells, ar studied under a microscope, they are mounted on a slide to which a drop of conventionalism saline (salt) solution, rather than tap pee, has been added. Explain why this is the best mode for preparing these cells.If the person drank the sea water, cells in digestive system would be contact by a hypotonic solution and would lose water. Cells would become dried and cease to function.4. Under what natural conditions might plant cells become plasmolysis?There w ill be a net movement of water into the ameba in freshwater environment.5. Two cells have the same internal concentration of sugar solution. They are both set in distilled water. Even though both cells expand over time, one expands faster than the other. What are both(prenominal) reasons for this observation?The disease will cause severe diarrhea. Human consistence will be infected with bacterium when drinking contaminated water, and sticks to the intestinal lining. . Intestinal cells start secreting sodium and chloride ions into theintestinal legato. This upsets the balance 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 wipe out infected people.6. After eating a packet of slated potato chips your lips oftentimes feel dry. Explain why?Blood glucose aims are measured in mill moles of glucose per liter of line of reasoning (mmol/L). The normal level is around 5 mmol/L. A 5% solution of glucose is roughly equivalent 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 thirst and excessive micturition 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 living cell into a drop of liquid contains less than 5% sugar. a) Make a hypothesis to explain what caused the change in sugar concentration external the living cell. It is hypothesis a living cell being placed into a drop of liquid contains less than 5% sugar cease cause the sugar concentration outside the living cell.8. A blood corpuscle 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 root tissue in citrus trees to the surroundings by osmosis. There is a lack of water fo r photosynthesis, causing smaller yields of citrus fruit.