Keeping conditions inside the body the same is called homeostasis. It’s not easy. Lots of things have to happen‚ e.g. energy transferred between body and environment‚ carbon dioxide is a waste product of respiration and has to be transported by the bloodstream to the lungs where it is breathed out‚ waste and waste products are filtered out of the blood and excreted in the urine. An incubator has a temperature sensor‚ a thermostat with a switch and a heater. Negative feedback happens when one factor
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(LG) by William Trevor‚ the play ‘A Doll’s House’ (ADH) by Henrik Ibsen‚ and the film ‘Juno’ directed by Jason Reitman. All three are substantially concerned with the struggles of each of the female protagonists. LG is set in 1921 Ireland and follows an upper class Anglo-Irish family living in Lahardane‚ Co. Waterford. This was a time when there was a distinct social class divide and the fight for equality of the sexes was non-existent. Similarly ADH is set in 1880s‚ Norway where a class divide was
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stimulating the release of ADH is the osmolarity in the blood; which is the concentration of solutes outside of cells. Typically‚ ADH is released under conditions of elevated osmolarity above a certain level and not under lower osmolarity conditions. This increase in osmolarity is detected by pressure receptors (osmoreceptors) in the hypothalamus. Once released‚ ADH makes its way to the kidneys where it is able to bind to receptor proteins on cells in the collecting ducts of nephrons. ADH allows water to leave
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Central Neurogenic Diabetes Insipidus‚ Syndrome of Inappropriate Secretion of Antidiuretic Hormone‚ and Cerebral SaltWasting Syndrome in Traumatic Brain Injury Trauma Topic Description: This article focuses on Central Neurogenic Diabetes Insipidus (CNDI)‚ Syndrome of Inappropriate Secretion of Antidiuretic Hormone (SIADH)‚ and Cerebral Salt-Wasting Syndrome in Traumatic Brain injury (CSWS). Comparison of lab results and treatments are reviewed. Topic objectives: At the end of this topic‚ the participant
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GENERAL PRINCIPLES OF DISORDERS OF WATER BALANCE (HYPONATREMIA AND HYPERNATREMIA) AND SODIUM BALANCE (HYPOVOLEMIA AND EDEMA) Literature review current through: Sep 2013. | This topic last updated: ene 15‚ 2013. 1. INTRODUCTION — The plasma sodium concentration is regulated by changes in water intake and excretion‚ not by changes in sodium balance. hyponatremia is primarily due to the intake of water that cannot be excreted hypernatremia is primarily due to the loss of water that has not
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application to rotifers. Hydrobiologia 387/388: 385-387 Micales‚ J.A.‚ & Bonde‚ M.R. (1995). Isozymes: Methods and Applications‚ CRC Press‚ 116-118. Laurie‚ C.C.‚ & Stam‚ L.F. 1988. Quantitative analysis of RNA produced by Slow and Fast alleles of Adh in Drosophila melanogaster. Genetics. 85.14: 5161
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RBF & GFR – increase GFR by dilation of afferent arteriole • ADH – decrease RBF and GFR by constriction • NO – dilates & increases RBF • Endothelin‚ adenosine & ATP – constricts and decreases RBF - via stretch of vessels • Angiotensin II – constricts afferent & efferent* (at HIGH doses) – ? GFR II. Electrolyte-Water Balance and Regulation • Neurohumoral Regulation – Renin-Angiotensin- Aldosterone System (RAAS) – ADH (Anti-Diueretic Hormone) aka Vasopressin – ANP Na Handling and
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with acidosis? What is this called? What effects does it have? 4. Saline solution is used to reverse hypotonic hydration. Are body cell membranes permeable to saline? Explain your response. 5. Explain the renin-angiotensin mechanism. 6. Explain how ADH compensates for blood that contains too many solutes. Answers 1. Three types of homeostasis are involved: fluid balance‚ electrolyte balance‚ and acid-base balance. Fluid balance means that the total quantity of body water remains almost constant
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causes Inappropriate milk production Hypo secretion causes Inability to breast feed offspring ADH - Antidiuretic Hormone 1. Produced and released by Hypothalamus / Posterior Pituitary Gland 2. Target of ADH is the kidney 3. Effects of ADH is to manage body water by acting on the kidney to inhibit urine formation 4. Regulation of ADH is neural 5. ADH is a peptide 6. ADH is water soluble 7. ADH works by Secondary Messenger – PIP2 8. Endocrine disorders - Hypo secretion causes Diabetes Insipidus
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Microorganisms: * Small living organisms; there are 3 types * Bacteria – ecoli‚ salmonella * Fungi – mushrooms‚ athletes foot * Virus – influenza (flu)‚ HIV * When they enter our body‚ they multiply and release toxins / harmful chemicals into our blood * They duplicate every 20 minutes * Physical barriers: eyelashes prevent MO’s from entering through our eyes‚ nasal hairs reduce them‚ skin is a barrier to them (although they can enter through cuts)‚ chemicals in tears
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