Describe the normal process of cell division (mitosis)‚ and explain how this process is affected in the abnormal growth of tumours Cell division is important as it allows cells to reproduce also they divide so that organs can grow and be repaired. “In the form of cell division called Mitosis‚ one cell divides into two daughter cells‚ each of them then complete but smaller than the original cell.” [1] The cell cycle is a seven stage process by which a cell duplicates itself and divides in two.
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1. Epithelial tissue ________. A) is usually acellular B) contains a number of neuron types C) is highly vascularized D) has a basement membrane 2. Which is true concerning muscle tissue? A) cuboidal shape enhances function B) is a single-celled tissue C) highly cellular and well vascularized D) contains contractile units made of collagen 3. Which of the following is true about epithelia? A) Pseudostratified epithelia are commonly keratinized. B) Stratified epithelia are
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Epithelial Tissue covers body surfaces (epi‚ on + thelium‚ surface). Epithelial tissue consists of cells attached to one another to form an uninterrupted layer of cells that separates the underlying tissues from the outside world. The body’s epithelium not only covers its obvious surfaces (such as the epidermis of the skin and the linings of respiratory‚ urinary‚ and digestive tracts) but also extends into all of the complex invaginations which form lungs‚ kidneys‚ sweat glands‚ digestive glands
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All vertebrate bodies supported by internal skeleton skill around brain and vertebra around spinal cord and dorsal nerve cord. 2. What are the four levels of organization in vertebrate bodies? Cells‚ tissues‚ organs‚ organ systems. 3. What are tissues? Groups of cells similar in structure and function are organized into tissues. What are the four primary tissues in adult vertebrates? Epithelial‚ connective‚ muscle‚ nerve.
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Connective Tissue As the name implies‚ connective tissue serves a "connecting" function. It supports and binds other tissues. Unlike epithelial tissue‚ connective tissue typically has cells scattered throughout an extracellular matrix. Loose Connective Tissue In vertebrates‚ the most common type of connective tissue is loose connective tissue. It holds organs in place and attaches epithelial tissue to other underlying tissues. Loose connective tissue is named based on the "weave" and type
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Planning Exercise Aim To investigate the effect of phosphate on cell division in root tips. Background knowledge Phosphate ions (macronutrients) are needed large amounts by plants. They are required for root growth. For the root tips cells to divide‚ mitosis has to occur. Phosphate is needed for production of ATP which provides energy for mitosis to occur. DNA replication occurs during interphase of the cell cycle. DNA is made up of nitrogen containing base‚ pentose sugar and phosphate group
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specific for a particular reaction. However‚ there are several factors affect the rate of enzyme reactions‚ they are temperature‚ pH‚ concentration of enzyme‚ concentration of substrate and inhibitors. High temperature and pH affects the structure of enzyme‚ irreversible denaturation occurs‚ the shape of active site is changed‚ enzymes therefore no longer function. The effect of the other factors is slowing down the rate of enzyme reactions‚ it depends on the concentration of those factors. Since enzymes
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Connective Tissue Characteristics of connective tissues • Extracellular matrix separates cells • Most widely variable of tissues • Many varied functions • Common (mesenchyme) origin • Degrees of vascularity Functions • Binding • Suport • Protection • Insulation • Transport Structural Elements • Fibers ⁃ Collagen (white) fibres ⁃ Elastin (yellow) fibers ⁃ Reticular fibers • Ground substance ⁃ Amorphous material fills space between cells and contains fibers
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| NAM_________________________ DATE_____________ | | NO | NAME OF TISSUE / SPECIMEN | NAME OF THE ORGAN SYSTEM | LABEL SPECIMEN | FUNCTION | DESEASE | Type of tissuesection | Staining technique | REFRENCE | MAGNIFICATION | DRAWING / SKETCH | 1 | Acute Lymphocyte Leukemia | Cardiovascular System | Blood | Type of cancer of the blood or bone marrow characterized by an abnormal increase of white blood cells | Leukemia | Blood Smear | Hematoxylin | http://swc2.hccs.edu/bio/labs | 451x306 pixels
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the NPVs and IRRs for each option‚ labor intensive and capital intensive‚ Soderberg should recommend that the Jacobs division move forward with production of Silicon-X using the labor-intensive option. The NPV and IRR methods make the same decisions if used for independent projects however‚ since these projects are mutually exclusive‚ the best NPV option should be used. In this case the NPV for the labor-intensive option is positive at twelve percent‚ sixteen percent and twenty percent while
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