Lacrosse Monster #2 Dates performed: 10/10/11 and 10/11/11 Introduction: The purpose of the laboratory investigation was to observe the diffusion of water across a semi-permeable membrane. In this lab‚ dialysis tubing was used to represent the semi-permeable cell membrane. Three dialysis tubes were prepared with 5% sucrose solution and were soaked in solutions of different concentrations. The diffusion of water across a semi-permeable membrane is called osmosis. When water diffuses‚ the water
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is a hormone that causes the renal tubules to reclaim sodium ions from the filtrate. =TRUE The kidneys are stimulated to produce renin ________. =by a decrease in the blood pressure An important characteristic of urine is its specific gravity or density‚ which is ________. =1.001-1.035 Which of the following is the functional unit of the kidney? =Nephron In which part of the kidney is reabsorption (1) dependent upon the body’s needs at the time‚ and (2) regulated by hormones?
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Urinalysis MA 116 Dr. Reece November 26‚ 2012 Hydronephrosis is a condition in which the kidneys are swollen due to the obstruction of urine flow in any part of the urinary tract. Hydronephrosis is also referred to as “water inside the kidney”. The word hydronephrosis can be broken down in medical terms as follows: the term “hydro” represents “water”‚ the term “nephron” represents “kidney”‚ and the term “sis” represents “an action‚ process‚ state‚ or condition” Hydronephrosis is not
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Excretory System Review Main Concepts: Describe the major gross anatomical structures of the excretory system. Kidneys: receive about 25% of the cardiac output; produce urine (a fluid containing water‚ ions‚ and small soluble compounds) Ureters: receive urine from the kidneys and conduct it to the urinary bladder. Urine movement involves a combo of gravity and the peristaltic contractions of smooth muscle in the walls of the ureters Urinary Bladder: receives and stores urine prior to elimination
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Organs * Kidneys are major excretory organs * Urinary bladder is the temporary storage reservoir for urine * Ureters transport urine from the kidneys to the bladder * Urethra transports urine out of the body Kidney Functions * Removal of toxins‚ metabolic wastes‚ and excess ions from the blood * Regulation of blood volume‚ chemical composition‚ and pH Kidney Functions * Gluconeogenesis during prolonged fasting * Endocrine functions * Renin: regulation of blood pressure and kidney function
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* Healthy kidneys produce the hormone erythropoietin which stimulates the bone marrow to make oxygen-carrying red blood cells. As the kidneys fail‚ they produce less erythropoietin‚ resulting in decreased production of red blood cells to replace the natural breakdown of old red blood cells. As a result‚ the blood carries less hemoglobin‚ a condition known as anemia. This can result in: Feeling tired and/or weak Memory problems Difficulty concentrating Dizziness Low blood pressure * Proteins
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Excretory system Excretion is the removal of waste products of metabolism from our body system. Contents • 1 Excretory functions • 2 Component organs o 2.1 Lungs o 2.2 Kidneys o 2.3 Ureter o 2.4 Urinary bladder o 2.5 Urethra o 3 Urine formation4 Reasons For Excretion The excretory system removes metabolic and liquid toxic wastes as well as excess water from the organism‚ in the form of urine‚sweat‚urea or bile. This is important so as to help maintain balance within the organism
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What is organ trafficking? * Trade involving inner human organs (heart‚ liver‚ kidneys) * For organ transplants * Illegal in all countries except Iran BACKGROUND IN IRAN: * Takes from both cadavers (13%) & donors * Law was passed in 2000 * Iranians cannot sell to non-citizens HOW: * Find donor/seller * Some people advertise their kidneys by writing their blood type and phone number on walls opposite major hospitals in graffiti style * OR * Non-profit
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understand the function and inner workings of the kidneys. The human body requires blood to be circulated in order for organs and tissues to be perfused. The perfusion of blood is enriched with products such as plasma and cells‚ used to keep the body functioning. Once the products are used to their capacity they need to filtered out and become waste products to be excreted. A portion of these waste products get excreted through the kidneys. The kidneys filter blood and excrete urine (Smith‚ 2013).
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Organisation of the Urinary System • • • • Kidneys Ureters Urinary bladder Urethra 5 Position of the Kidneys CT abdomen with contrast MRI coronal abdomen 6 Protection of the Kidneys • 3 layers of connective tissue: Renal cortex – Inner layer- Renal capsule – Middle layer- Adipose capsule – Outer layer-Renal fascia Retroperitoneal space 7 Surface anatomy of the Kidney • Hilum is located on the medial surface 10 cm 3cm 5.5cm 8 Internal Structure of the Kidney Renal Lobe Renal pyramids Renal
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