The proximal tubule is just after the bowmans capsule. Diabetic damage of selective renal reabsorption assessed by albumin negative charge. Official ocr a2 biology f214 thread page 3 the student room. Official ocr a2 biology f214 thread page 3 the student. It is the process by which certain substances that are required by the body such as glucose, amino acids, vitamins and water that have been filtered out of the blood during ultrafiltration, are reabsorbed. There is also a plenary worksheet with practice questions on ultrafiltration and selective reabsorption. Delivery guide for ocr asa level biology b advancing. Jun 07, 2017 explaining the process of selective reabsorption in the proximal convoluted tubule of the kidney. Diabetic damage of selective renal reabsorption assessed by.
Much of what has been filtered out needs to be returned to the blood they are too precious to lose so the next process is called selective reabsorption. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Filtration and reabsorption in the kidney teaching resources. A2 biology selective reabsorption ocr a chapter 15. This website and its content is subject to our terms and conditions. Biology mock body fluids practical assessment ocr biology f214 communication, homeostasis and energy friday 22 june 2012 a2 ocr biology 2016 please help. Glucose reabsorption takes place in the kidneys, where the blood is filtered. Passive tubular reabsorption is the movement of molecules from an area of high concentration to an area of low concentration without the use of energy atp. Selective reabsorption energy required from mitochondria. This creates a small electrical gradient favoring anion reabsorption. Filtration is the process whereby usually passive transport is triggered through the push of blood flow and pressure. Question sheet and diagram on concentration of glomerular filtrate in the loop of henle key words.
Jan 24, 2014 selective reabsorption mainly occurs in the proximal tubule, which is the beginning of the tubule. Dec 10, 2009 selective reabsorption takes place in the proximal convoluted tubule pct of the kidney. Nov 15, 2016 the main activity involves details of how the walls of the pct are specialised for selective reabsorption, and a step by step, labelled diagram to explain how glucose and amino acids are selectively reabsorbed in the pct. Thus, in the early proximal tubule, the chemical and electrical gradients favor cl. This commonly occurs throughout the entire nephron system especially within the glomerulous and bowmans capsule where water, nitrogenous wastes, glucose, amino acids, vitamins, minerals, bicarbonate ions and hormones. Tes global ltd is registered in england company no 02017289 with its registered office at 26 red lion square london wc1r 4hq. Includes a labelling starter activity from previous lesson on ultrafiltration, the glomerulus and bowmans capsule. Glucose is filtered in the glomerulus and reabsorbed by the proximal tubules. Selective absorption definition is the absorption by a substance of only certain wavelengths of radiation with the coincident exclusion or transmission of others. Water levels and the kidney scool, the revision website. Explain the process of renal tubular secretion and reabsorption, giving examples of the major ion transport mechanisms in the kidney. Information and translations of selective reabsorption in the most comprehensive dictionary definitions resource on the web. Selective reabsportion is when useful substances are reabsorbed from the nephron into the blood and excretory substances are left in the nephron to be excreted.
Selective absorption definition of selective absorption by. Selective reabsorption study guide by madidurnin includes 17 questions covering vocabulary, terms and more. Primary urine is formed by filtration from the blood. The children playing the game each have a fishing pole.
A2 ocr biology selective reabsorption kidneys youtube. It refers to the kidney and nephrons and suchi may be overthinking it. Selective reabsorption online notes on microbiology. How is selective reabsorption acheived in the kidneys. The children playing the game each have a fishing pole with an attached magnet to catch the fish as they move by. Selective reabsorption is the reabsorption of only some molecules from the glomerular filtrate into the blood. The urinary system selective reabsorption know your body.
Nephrons are the main filtration unit and contain a network of capillaries and tubules. Selective reabsorption is a crucial function of the nephronkidney as it takes the useful substances back into the body, which would otherwise be lost and wasted through urine excretion. B3 biology edexcel exam show 10 more ultrafiltration biology ocr f214 2016 paper predictions. In the cells lining the proximal convoluted tubule, sodiumpotassium pumps present in the membrane in contact with tissue fluid pump sodium ions out of the cells. Reabsorption in the proximal convoluted tubule selective reabsorption definition protein in urine urea productionblood filtration.
Explain why some waste products are primarily lost in the urine. Microvilli increases the surface area for reabsorption. Kidneys, ultrafiltration and selective reabsorption. Question sheet and diagram on selective reabsorption in the proximal convoluted tubule 3. Tes global ltd is registered in england company no 02017289 with its registered office. Definition of selective reabsorption in the dictionary. Selective reabsorption is all about the reabsorption of water and salts once unltrafiltration has occurred. In the cells lining the proximal convoluted tubule, sodiumpotassium pumps present in the membrane in contact with. Dec 10, 2012 a2 ocr how does selective reabsorption occur in the pct. Glucose, amino acids, and salts can be reabsorbed against a concentration gradient and their transport across the nephron into the capillaries requires energy see active tran. Ocr f214 excretion water reabsorption the student room. A2 ultrafiltration and selective reabsorption kidney anatomy.
Quizlet flashcards, activities and games help you improve your grades. Cotransporter proteins transport glucose or amino acids, in association with sodium ions from the tubule into the cell facilitated diffusion. A detailed power point presentation on the function of the loop of henle as a countercurrent multiplier system, and osmoregulation through adh. I will try and explain it the way in which i get it and my teacher thaught me, i just wanna point out i have that. These reabsorbed substances are returned to the blood. Low concentration of na ions in cell causes sodium potassium pumps in the basal membrane to pump sodium in the epithelial cell.
Exploring the potential of quinoa accessions for salt tolerance in soilless culture. I will try and explain it the way in which i get it and my teacher thaught me, i just wanna point out i have that picture in my ocr bio book lool it does my head in. Explaining the process of selective reabsorption in the proximal convoluted tubule of the kidney. The nephron ultrafiltration and selective reabsorption. For the alevel ocr specification but relevant to other exam boards like aqa. F214 and f215 ocr june 2014 mark schemes ocr a2 chemistry f214 14th june 2016 official thread 2016 alevel exam threads directory. Nov 15, 2016 a detailed power point presentation on the function of the loop of henle as a countercurrent multiplier system, and osmoregulation through adh and permeability of the collecting duct. A2 ocr how does selective reabsorption occur in the pct. From this primary urine certain substances are reabsorbed into the blood and other substances are secreted into the primary urine from the blood. As only certain substances are reabsorbed, it is known as selective. Primeocr best ocr engine high accuracy ocr software. Apr 05, 2018 selective reabsorption is a crucial function of the nephronkidney as it takes the useful substances back into the body, which would otherwise be lost and wasted through urine excretion.
Choose from 500 different sets of reabsorption flashcards on quizlet. Dec 23, 2017 this website and its content is subject to our terms and conditions. Primeocr reduces overall ocr processing costs by reducing the total number of errors generated from ocr and providing a level of reliability not available with other ocr engines. Selective reabsorption definition of selective reabsorption. Presentation on selective reabsorption and indirect active transport in the proximal convoluted tubule. Na ions enter from lumen by facilitated diffusion using co transporter proteins which transports glucose and amino acid by facilitated diffusion into the. The cells lining the proximal convulated tubule are specialised to achieve reabsorption. The main activity involves details of how the walls of the pct are specialised for selective reabsorption, and a step by step, labelled diagram to explain how glucose and amino acids are selectively reabsorbed in the pct. Selective reabsorption occurs because during ultrafiltration, important components of the blood are filtered out and they need to be reabsorbed into the body. When the filtrate leaves the bowmans capsule and enters the proximal convoluted tubule, sodium and chloride ions, as well as amino acids, glucose and vitamins move back into the blood. It is the process by which useful substances within the glomerular filtrate such as glucose, amino acids, vitamins and water are taken back into the blood after ultrafiltration.
Selective reabsorption takes place in the proximal convoluted tubule pct of the kidney. The movement of sodium ions and other solubles back into the bloodstream causes within the pct a greater osmotic concentration, therefore water moves into the peritubular capillaries by. Aug 22, 2016 question sheet and diagram on selective reabsorption in the proximal convoluted tubule 3. Again, this section begins by encouraging the students to. Filtration of the blood is relatively nonselective, but reabsorption of materials is selective. Learn reabsorption with free interactive flashcards.
This article is within the scope of wikiproject medicine, which recommends that medicinerelated articles follow the manual of style for medicinerelated articles and that biomedical information in any article use highquality medical sources. To understand the concepts of ultrafiltration, selective reabsorption and osmoregulation, you need to ensure students have a clear understanding of concepts covered in module 2 including adaptations in cells to increase rates of transport, the processes of diffusion, facilitated diffusion, osmosis and active transport. Whenever a molecule leaves, it is accompanies by water, which means a lot of water is reabsorbed by the bloodstream in this process. The reabsorption process is similar to the fish pond game that you see in some amusement parks or state fairs. Selective reabsorption mainly occurs in the proximal tubule, which is the beginning of the tubule. Study 69 terms biology chapter 44 flashcards quizlet. Selective reabsorption is the process whereby certain molecules e. Do you do biology ocr, geography edexcel or psychology aqa at a2. Reabsorption definition of reabsorption by medical dictionary.
Delivery guide for ocr asa level biology b advancing biology. In these games, there is a stream that contains different colored plastic fish with magnets. Mar 03, 2017 this is a video for gcse and igcse biology. For example, the kidney selectively reabsorbs substances it has already secreted into the renal tubules, such as glucose, protein, and sodium. Selective absorption article about selective absorption by.
Selective reabsorption takes place in the proximal convoluted tubule pct tubular secretion is the last function of the nephron and this refers to the secretion of certain soluble substances, by active transport, into the distal. Selective reabsorption ocr alevel biology a teaching. Selective reabsorption is one of the mammalian kidneys functions. Glucose transporters move the molecules into the blood.
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