what provided two of the 3 main points of the cell theory. The final part of the theory‚ that states that all cells come from pre existing cells‚ was proposed by Rudolf Virchow. Through his microscope‚ he was able to witness and name the process of mitosis‚ which is how cells reproduce. Technology has facilitated not only the discovery of the three main points of cell theory‚ but it also did not at all
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the organism to obtain the required nutrients and also expelling the wastes produced by metabolism. In the end‚ it becomes impossible for diffusion to occur efficiently‚ where the cells becomes too large so they would divide through the process of mitosis. For example‚ the alveoli in our lungs have a relatively high large surface area to volume ratio‚ meaning that gas exchange in humans happen at a fast and efficient rate; the alveoli has a large surface area for diffusion to happen‚
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the male is inserted into the female’s vagina‚ and then either partner initiates rhythmic pelvic thrusts until the male ejaculates semen‚ which contains sperm‚ into the vaginal canal. PREGNANCY This is the time that fetus develops‚ dividing via mitosis inside the female. BIRTH which begins with the fetus being pushed out of the birthing canal. The newborn‚ which is called an Infant should typically begin respiration on its own shortly after birth. PARENTAL CARE babies are nearly helpless and require
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Surname Centre Number Candidate Signature Other Names Candidate Number Leave blank General Certificate of Education June 2004 Advanced Level Examination BIOLOGY/HUMAN BIOLOGY (SPECIFICATION A) Unit 5 Inheritance‚ Evolution and Ecosystems Tuesday 22 June 2004 Morning Session No additional materials are required. You may use a calculator. BYA5 For Examiner’s Use Number 1 2 Mark Number Mark Time allowed: 1 hour 30 minutes Instructions • Use blue or black ink or ball-point pen. • Fill in the boxes
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How do muscles move the skeleton? Contract How may possible gametes with A/A? one What process is blocked by operons/prokaryotes? Transcription What is the least involved in translation? DNA In the picture of muscle contraction‚ know what bands decrease in size and which ones stay the same. When the muscle contracts the sarcomere gets smaller and the area between myosin filaments. What are the net products of glycolysis? ATP‚ NADH‚ Pyruvic Acid What are the net products of cellular respiration
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The causes of disease in humans. Lifestyle 1. BIOL1 : Basis and risk factors of heart disease 2. BIOL1 : Basis of lung disease and lung function Pathogens 3. BIOL1 : Nature of pathogens and infection 4. BIOL1 : Cholera and dehydration 5. BIOL2 : Horizontal gene transfer and antibiotic resistance Genetics 6. BIOL1 : symptoms of lactose intolerance 7. BIOL2 : Formation of non-functional enzymes 8. BIOL5 : Risk factors for cancer‚ the nature of cancer‚ tumours suppressor and proto-oncogenes
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Immunosuppressive Immunosuppressive drugs drugs Immunosuppressive Immunosuppressive Drugs Drugs O tli Outline of Lecture Topics: fL t T i 1. Immune Responses 1 Immune Responses 2. Classes of Immunosuppressive Drugs Bertram G Katzung‚ 11th Edition. Chapter 55‚ pp 963-986. Immunosuppressive Immunosuppressive Drugs drugs g 1. IMMUNE RESPONSES A. Normal Immune Responses Protect host from infections‚ pathogens‚ and to eliminate disease. Protection from infection and disease is provided by the
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basis: some days we are full of energy and on others we feel lethargic * disease 4) the definition is very broad eg even minor ailments such as a cut finger using this definition would be regarded as a disease Functioning of genes‚ mitosis‚ differentiation and cell specialisation are important in the maintenance of health * Genes = the units of inheritance. A gene is a small section of a DNA molecule that controls the production of a polypeptide or protein. Genes control the cell
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taken away. F. Why was reestablishing oxygen flow to Joseph’s body so important? What processes would be affected by lack of oxygen? From what I said in the first answer ATP is one of the keystones of the body’s production and regulation. And cell mitosis would be affected‚ along with homeostasis. H. Explain why Joseph’s heart failed
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The Cytoplasm Caroline Moore How to identify the organelle: The cytoplasm lies directly outside the nucleus‚ filling up the “empty space” outside of the Nucleus- (the pink sphere in the middle of the cell in the diagram on the right). Function of the organelle in an animal cell: Cytoplasm is the jelly-like part of the cell. It is where the nutrients are used. It is used to provide support for the other organelles in the cell like the nucleus and cytoskeleton
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