phases: a dispersed phase (or internal phase) and a continuous phase (or dispersion medium). A colloidal system may be solid‚ liquid‚ or gaseous. Many familiar substances are colloids‚ as shown in the chart below. As well as these naturally occurring colloids‚ modern chemical process industries utilize high shear mixing technology to create novel colloids. The dispersed-phase particles have a diameter of between approximately 5 and 200 nanometers.[2] Such particles are normally invisible in an optical
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Give an account of protein structure and function Protein structure 1 Proteins consist of amino acids joined together (in chains) 2 A protein is unique because of the sequence of amino acids 3 The amino acids are joined by strong peptide bonds 4 to produce the primary structure 5 Further (weak) hydrogen bonding between acids 6 produce the secondary and tertiary structures A maximum of 4 marks can be gained from this section. Protein function 7 Some proteins are enzymes + named example
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Should transgender children be allowed to receive hormone therapy? The term transgender is defined as the “non-identification with‚ or non-presentation of‚ the sex (and assumed gender) one was assigned at birth” and is one that describes an estimated 300‚000 to 500‚000 people in the UK of all age groups. We live in a Western culture where a distinct gender binary of either male or female exists‚ a social dichotomy that is enforced upon an individual from the day they are born‚ with their sex being the
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It’s only natural for people ages 40 and up to start coming into terms with the symptoms of andropause and menopause. However‚ this period in life doesn’t promise a lot of pleasant changes. Along with hair loss and a lower sex drive‚ the general experience is marked with total discomfort. To alleviate this pain‚ many people around this age do their best to maintain their physical and mental health. While routine exercise‚ eating a proper diet‚ and living a stress-free lifestyle does the job of easing
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are chemosensory systems. Chemoreception means a molecule from the environment binds to a receptor on a cell’s surface. The receptor is shaped to receive and then respond when a specific type of molecule binds. This binding triggers a signal with the information about the molecule having been detected. Explain the importance of hair cells with the sense of hearing and equilibrium. Hair cells are simple mechanoreceptors which are complex structures of the inner ear and the different
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Auxin Auxin are essential plant hormones that promote the lengthening of the cell‚ which is a critical step before the cell goes through cell differentiation. The auxin can do this by increasing the amount of water taken in by the cell‚ which improves the elasticity of the cell and therefore can take more water and can get increasingly longer. And don’t think for a second that that’s all auxins do auxins may have been the first plant hormone to be discovered doesn’t make it the least important
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The Hair Follicle Stem Cell Niche and the Function of the Rac1 protein within the niche. Abstract: An adult stem cell’s niche is responsible for the preservation of the stem cell’s undifferentiated state through either intrinsic or extrinsic expression of specific proteins (Scadden‚ 2006). Situated in the bulge of the hair follicle‚ hair follicle stem cells (HFSC) are quiescent in nature and are responsible for not only its self renewal but also in the production of rapidly proliferating cells
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Remember‚ there are many sites claiming to be the best in business‚ but at Dissertation Globe‚ we let our papers do the talking! Website: www.dissertationglobe.co.uk Email: support@dissertationglobe.co.uk Growth Hormone Deficiency Growth hormone deficiency is a medical state in which the body generates inadequate amount of growth hormone. This deficiency of growth hormone in children develops dwarfism. For normal growth and development of children‚ growth hormone is very essential.
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taking hormones such as estrogen and progesterone (Bee‚ 2012‚ pg.394). Taking hormones to reduce the effects and symptoms of menopause is called hormone therapy (HT). There are advantages and disadvantages of taking hormones to reduce the symptoms and effects of menopause. During the 1990’s‚ physicians commonly prescribed HT for menopausal women because they thought that it would "protect women against heart disease and dementia" (Bee‚ 2012‚ pg.394). However‚ the perception of this therapy
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Lab Exercise 8.5.1 Hormone Levels During The Menstrual Cycle a) WX represents the hormones‚ which stimulate the follicle‚ FSH‚ and YZ represents the thickening of the corpus luteum‚ done by LH‚ which produces progesterone (Y). b) The ovarian hormones released by WX is estrogen and progesterone is released by YZ. c) Estrogen and progesterone exert negative feedback effects. d) See attached graph. e) See attached graph. f) Before ovulation the temperature slowly decreases and
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