How the structure of proteins are related to their functions Rachel Morris The basic building blocks of proteins are amino acids‚ the biuret reaction tests for protein. A solution of sodium hydroxide is added to a sample then a few drops of copper sulphate solution‚ if positive – the solution will turn mauve. There are 20 different amino acids and they can be joined in any order. Therefore there can be many different functions. A protein consists of one or more polypeptide chains (a polypeptide
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P5 – Describe the Structure and Function of the Cardiovascular System Changes in Stroke Volume Stroke volume is the amount of blood pumped out the left ventricle‚ every beat your heart makes. It can differ from your resting heart beat and your heart beat when exercising. Normally‚ when exercising‚ your heart rate increases meaning the stroke volume also increases. The blood pumped by the left ventricle is oxygenated‚ and will deliver oxygen to the muscle. The more blood injected in a heartbeat means
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disorder is a common brain affliction‚ with many causes. Research about its effects on the brain and brain chemistry are still going on‚ and treatments are still being tested. Post-traumatic stress disorder affects multiple areas of the brain‚ and that‚ in turn‚ affects an individual’s ability to function. Learning about PTSD and its effects on the brain is important for researching and advancing its treatment and prevention. I will be researching PTSD’s affects on the brain physically and chemically
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I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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gets to a plants cell by diffusion. Both stems and roots contain xylem vessels and phloem tubes. In a stem these are grouped into vascular bundles arranged in a ring. In a root these are arranged in the centre forming a structure called the stele. Xylem tissue has the dual functions of support and transport. It contains several different types of cells these are vessel elements‚ traceids‚ fibres and parenchyma cells. In contrast to this phloem tissue is living and comprises of sieve tubes‚ phloem
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Comparison of Brain Structure in Mammals‚ Amphibians‚ and Birds The brain is a complex structure in all living species‚ even though they differ greatly in mammals‚ amphibians‚ and birds. It is the most important part of the body‚ because it maintains homeostasis and assists in every function. The brain structures of the three vertebrates‚ mammals‚ amphibians‚ and birds‚ have similar features and functions. There is still a great difference in the size‚ and importance of these structures in the brain
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Court System Structure‚ Function and Jurisdiction Performance Assessment Task 4 Kelly Schoepke Introduction to Criminal Justice Phil Schmidt November 6‚ 2009 Over the years the U.S. court system has evolved into an intricately balanced legal process (Siegel‚ 354). The founding fathers of the nation considered an independent federal judiciary essential to ensure fairness and equal justice for all citizens of the United States. The American judicial system is made up of two separate court
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larger system and a combination of smaller systems. 3. Describe the structure of a neuron and the pro cess by which an action potential is triggered. 4. Describe how nerve cells communicate‚ and dis cuss the importance of neurotransmitters for human behavior. 5. Discuss the significance of endorphins‚ and ex plain how drugs influence neurotransmitters. 6. Identify the major divisions of the nervous sys tem and their primary functions‚ and describe the neurons that carry information throughout the system
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This experiment was conducted to see if the brain would perform better in mathematical tasks‚ if there was an increase in blood flow through exercise. The increase in blood flow should help the brain to perform better as it receives more oxygen. This is because all cells require oxygen for cellular respiration. To test this‚ three females‚ aged 16-17‚ were asked to answer four mathematical questions for four trials. As each trial progressed‚ subjects had to run on the spot for an extra 30s. It was
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the specialization of function in specific structures of the brain? Developmental cognitive neuropsychology seeks to understand and explain the relationship between the human brain and its function. One might consider the extent to which cognitive development can be understood in terms of the specialisation of function in specific structures of the brain. Two contrasting theories of functional specialisation will be presented‚ debating the means by which brain functions develop and contesting
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