Being the most abundant and important compound to life‚ living organisms would not exist without water. Within the human body the majority of biological reactions require water to take place. Although it is possible for human survival without nutrients for up to several weeks‚ without water humans would die in a matter of days. In the human body‚ water makes up 60-70% of adult body weight. At cellular level water makes up between 70-95% of the mass of a cell. The amount of water in the human body
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EXERCISE 9: RENAL SYSTEM PHYSIOLOGY Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise9_JohnSmith.doc. Please make sure that your answers are typed in RED. (You may delete these instructions before submission.) Grading:
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amounts and consistency of urine excretion. It is a rare condition‚ affecting approximately 1 in every 25‚000 people. Diabetes insipidus occurs because the body does not properly produce‚ store or release antidiuretic hormone (ADH) and kidneys do not respond properly to ADH. SIGNIFICANT OF THE NAME DIABETES INSIPIDUS Diabetes is a Greek word meaning “siphon”; it is derived from the verb diabainein‚ which means “to stand with legs apart or to go through.” Insipidus is a Latin word meaning
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Renal System Physiology Exercise 9 page. 121 SC 245 L Date: 12/18/2011 Point Break down: 100 points Questions: 60 points Data/Results: 15 points Summarizing activities: 25 points Introduction: In this lab we will learn how the kidney processes blood and produces urine. Activity 1: Investigating the Effect of Flow Tube Radius on Glomerular filtration. Data/Results: Questions: Please answer the questions in complete sentences and explain your answers. 1. What effect does increasing the afferent
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pituitary gland. This disrupts the normal storage and release of ADH. 2. Nephrogenic DI occurs when the kidneys are unable to respond to ADH. 3. Dipsogenic DI is caused by a defect in or damage to the thirst mechanism. This can result in an increase in thirst and fluid intake that suppresses ADH secretion and increases urine output. 4. Gestational DI only occurs during pregnancy. It occurs when the enzyme made by the placenta destroys ADH in the mother 4. How is pituitary diabetes insipidus
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PhysioEx – Exercise 9 Activity 1: 1. excretion and regulation 2. glomerular capillaries (glomerulus) & Bowman’s capsule 3. The filtrate flows from the Bowman’s capsule into the renal tubule called the proximal convoluted tubule then into the loop of Henle‚ and finally into the distal convoluted tubule: a. Proximal Convoluted Tubule b. Loop of Henle c. Distal Convoluted Tubule 4. When the radius of the afferent arteriole was decreased‚ the pressure and the filtration rate both decreased
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M09_ZAO2177_01_SE_CH09.QXD 3/4/11 2:08 AM Page 143 R E V I E W S H E E T EXERCISE NAME ________________________________ LAB TIME/DATE _______________________ A C T I V I T Y 1 9 Renal System Physiology The Effect of Arteriole Radius on Glomerular Filtration 1. What are two primary functions of the kidney? ____________________________________________________________ __________________________________________________________________________________________________ 2. What are the components
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Table 1. Details of the subjects in your experimental group. Subject Sex (M/F) Body weight (kg) Volume of water ingested (litres) Procedure (control‚ desmopressin or exercise) 1 M 68 0.816 Exercise 2 M 120 1.44 ADH 3 F 62 0.744 Control Table 2. Control Subject Data Time at which bladder was emptied prior to practical class__-__ Sample 1 Drink water (12ml/kg body weight) Sample 2 Sample 3 Sample 4 Sample 5 Sample 6 Time interval (min) -
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The body produces two hormones‚ antidiuretic hormone (ADH) and aldosterone‚ to help maintain hydration. Antidiuretic hormone is released by the pituitary gland in the brain to signal the kidneys to retain water. When ADH causes water reabsorption from the kidney tubules‚ the salts and wastes are concentrated in what will eventually be urine. High level of ADH secretion and water retention happen when dehydration causes increase of osmolarity. ADH then travels in the bloodstream to the kidneys where
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BIOS256 Week 4 Lab: #10 Influence of Fluid Intake on Urine Formation Laboratory Report Activity 10: Influence of Fluid Intake on Urine Formation PREDICTIONS 1. Urine output will be highest during: water loading 2. Urine osmolality will be lowest during: dehydration 3. Plasma osmolality: increases with dehydration METHODS AND MATERIALS 1. Dependent variable: urine and plasma values 2. Independent variable: fluid intake 3. Controlled variables: age‚ gender‚ and weight;
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