Preview

Cellular Respiration Lab

Powerful Essays
Open Document
Open Document
1049 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Cellular Respiration Lab
Diffusion & Cell Size Lab
Background
The absorption of nutrients, excretion of cellular wastes, and the exchange of respiratory gasses are life processes which depend upon the efficient transport of substances into, out of, and throughout living cells. The process of diffusion can be easily visualized by adding a drop of blue food coloring to a glass of water. Initially, the food coloring remains in a small area in the water, dying it a dark blue. Over time, the molecules of food coloring collide with each other, and with molecules of water, and the food coloring eventually disperses throughout the entire glass of water, resulting in a light blue color in the water. Much like the drop of blue dye diffuses through the glass of water, many important substances move into and out of cells by diffusion. Diffusion is the movement of a substance through a concentration gradient from high to low concentration. It is an example of passive transport because it requires no energy on the part of the cell. For this reason, diffusion is one of the most common and efficient means by which substances are transported between cells and their environment. The cell membrane is the selectively permeable barrier whose total surface area is important in regulating the substances that diffuse into or out of the cell. However, as a cell grows in size, its volume increases at a greater rate than its surface area. Consequently, the surface area of the growing cell soon becomes inefficient for effective diffusion throughout the cell. This relationship between surface area and the volume of a cell can be expressed as a ratio; and the need for an effectively large surface area to volume ratio is considered to be the most significant factor in triggering a cell to divide, and therefore, determining cell size.
OBJECTIVES

• Determine the extent and rate of diffusion into three different size agar cubes. • Calculate the surface area to volume ratio for each agar

You May Also Find These Documents Helpful

  • Satisfactory Essays

    3. As cell size increases, what happens to the surface area to volume ratio? Give examples from the lab.…

    • 300 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    8. If there is an increase in the partial pressure of carbon dioxide, then the amount of carbon dioxide found in the blood will: (increase, decrease, not change.)…

    • 713 Words
    • 5 Pages
    Satisfactory Essays
  • Satisfactory Essays

    cellular respiration lab

    • 396 Words
    • 2 Pages

    The purpose of this experiment was to determine the effect of body mass and temperature on the rate of respiration in the mouse.…

    • 396 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Respiration Lab

    • 717 Words
    • 3 Pages

    The objective of this lab was to figure out which has a higher cell respiration rate between crayfish and elodea. In order to figure this out we first set up three beakers to represent our control, elodea and crayfish and filled them with 75mL of culture solution which were dechlorinated making the solution acidic. We then had to place both the elodea and the crayfish in separate beakers filled with 25mL of water. The increase in volume of the water would represent the volume of the two test subjects. We then covered each beaker with plastic, but for the elodea we placed it under a can so it could be in the dark. After waiting 15 minutes to allow them to respire we took it out and add four drops of phenolphthalein, which was also acidic, to both beakers. Once both beakers got their four drops we added drops of NaOH, which was a base, until the solution turned pink. Our results were that the respiration rate of the crayfish was higher than the elodea.…

    • 717 Words
    • 3 Pages
    Satisfactory Essays
  • Better Essays

    Oxford Tutorial

    • 1838 Words
    • 8 Pages

    Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. Diffusion is a type of passive transport, because molecules are always in random motion, and as a result, will naturally balance a difference in concentration, and move from an area of higher concentration to an area of relative lower concentration.…

    • 1838 Words
    • 8 Pages
    Better Essays
  • Better Essays

    Cellular Energetics is the broad term that encompasses both cellular respiration and photosynthesis and refers to how energy changes and reacts within cells. Cellular respiration is the process by which cells break down sugars (ATP) in order to produce energy for other chemical reactions. Cellular respiration takes place mainly in the mitochondria and the reactants in this process are oxygen and glucose and the main product in this process is ATP as well as waste products which include carbon dioxide and water. Almost all organisms perform cellular respiration. There are two types of cellular respiration…

    • 1719 Words
    • 7 Pages
    Better Essays
  • Powerful Essays

    To be able to carry on metabolic processes in the cell, cells need energy. The cells can obtain their energy in different ways but the most efficient way of harvesting stored food in the cell is through cellular respiration. Cellular respiration is a catabolic pathway, which breaks down large molecules to smaller molecules, produces an energy rich molecule known as ATP (Adenosine Triphosphate) and a waste product that is released as CO2. Basically, cellular respiration is a metabolic process that releases energy from organic compounds (such as C6H12O6) by metabolic chemical oxidation in the mitochondria within each cell. Proteins, carbohydrates, and fats can all be broken down into fuel for the cell but cellular respiration is usually correlated with glucose. Cellular respiration also requires O2 to carry out its pathway, as oxygen will act as a final electron acceptor. So, the final equation that can be represented for Cellular Respiration is: C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + heat.…

    • 1940 Words
    • 8 Pages
    Powerful Essays
  • Good Essays

    Ap Bio Lab One

    • 432 Words
    • 2 Pages

    This lab helps further our understanding of essential principles behind diffusion and osmosis. Permeability, concentration gradients, plasmolysis, water potential, and equilibrium were also concepts that were delved into in this lab. Understanding how diffusion and osmosis works is essential to understanding biology. Each time a cell has something move into or out of it, some sort of principle studied in this lab is occurring. Diffusion, osmosis, and passive and active transport are all fundamental concepts of Biology. This lab simulated osmosis in the cell. In this case, we used dialysis tubing to simulate the semi-permeable membrane of an animal cell.…

    • 432 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Cells have kinetic energy, a source of energy stored in cells. This energy causes molecules to bump into each other and move in new directions. Diffusion is one result of this molecular movement. Diffusion is the random movement of molecules from an area of higher concentration to areas of lower concentration. Osmosis is a special kind of diffusion where water moves through a selectively permeable membrane that only allows certain molecules to diffuse though (Lab Manual 7e, 2010).…

    • 311 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Diffusion is the process that is used in oxygen entering a cell, and carbon dioxide leaving. These molecules will move from where they are at a high concentration to where they are at a lower concentration they diffuse down a…

    • 1729 Words
    • 7 Pages
    Powerful Essays
  • Powerful Essays

    Nt1310 Unit 1 Assignment

    • 3643 Words
    • 15 Pages

    The size of the surface must also be large enough to allow sufficient molecules to be transported to accommodate the metabolic processes in cell. For this reason, the surface area to volume ratio for any cell is critical. Size is also important in terms of width and length of a surface carrying out transport of materials. For example; the surface area of single-called alveoli in a person’s lungs, if spread out flat on a surface, would total the area of a football pitch.…

    • 3643 Words
    • 15 Pages
    Powerful Essays
  • Good Essays

    BSC2085L Anatomy Quiz 1

    • 550 Words
    • 3 Pages

    Diffusion is the movement of particles from a region of high concentration to a region of low concentration.…

    • 550 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    This is an experiment to examine how the Surface Area / Volume Ratio affects the rate of diffusion and how this relates to the size and shape of living organisms.…

    • 1322 Words
    • 6 Pages
    Powerful Essays
  • Powerful Essays

    Aerobic cellular respiration is the release of energy from organic compound from organic compounds by metabolic chemical oxidation in the mitochondria within each cell. Cellular respiration involves a series of enzyme-mediated reactions. The equation below shows the complete oxidation of glucose. Oxygen is required for this energy-releasing process to occur.…

    • 1687 Words
    • 7 Pages
    Powerful Essays
  • Powerful Essays

    Cell is the basic unit of life. It is enclosed by plasma membrane and is selectively permeable. Selective permeability is the function of the cell where it regulates the passage of specific molecules and materials that will enter and go out of it to maintain homeostasis. Homeostasis is the ability of the cell to seek and maintain a specific condition of equilibrium or stability within its internal environment in dealing with external exchanges. There are different substances that enter and go out of the cell. The process of crossing the plasma membrane can be classified as either passive or active transport (Calipjo et. al., 2010).…

    • 1407 Words
    • 6 Pages
    Powerful Essays