[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-500796-105":59,"doc-detail-500796-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","biology-class-12-concepts-in-homeostasis","Biology - Class 12 - Concepts in Homeostasis","","Class 12 Biology chapter material on homeostasis explains how organisms maintain internal conditions within a narrow range despite continuous fluctuations in the external environment. It defines homeostasis and connects it to protection of internal fluids from harmful changes, highlighting key vulnerable components such as water, solutes, and temperature. The text distinguishes regulation mechanisms including osmoregulation for water/solute balance and excretion for nitrogenous waste, along with thermoregulation for temperature control. A feedback-based control system model (receptor, control centre, effector) and negative feedback are introduced, with figures referenced.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/biology-class-12-concepts-in-homeostasis/500796/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/biology-class-12-concepts-in-homeostasis/500796.png","ImageObject",300,407,{"name":92,"@type":93},"Mary Man","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-21","2026-10-03",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is homeostasis and why is it important for organisms?","Question",{"text":112,"@type":113},"Homeostasis is the protection of an organism’s internal environment from harmful fluctuations in the external environment. It keeps internal conditions within a narrow range to support normal body functions.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which internal components are most affected by external environmental fluctuations?",{"text":117,"@type":113},"The most susceptible components are water, solutes, and temperature. Their regulation is necessary to prevent damage caused by external changes.",{"name":119,"@type":110,"acceptedAnswer":120},"What are the main mechanisms mentioned for regulation in homeostasis?",{"text":121,"@type":113},"The material describes osmoregulation for solute and water balance, excretion for removing nitrogenous wastes, and thermoregulation for maintaining internal temperature within a tolerable range.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},500796,1791536111,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},7421720224475,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","CLASS  \n12  \nBI0L0GY  \n留融结罷  \nBIOLOGY  \n2016-17  \nPUNJAB CURRICULUM ANDTEXTBOOK BOARD,LAHORE  \nKoracademy.com  \nPUNJAB CURRICULUM&TEXTBOK BOARD,LAHORE  \nAll rights are reserved with the Punjab Curriculum and Textbook Board,Lahore.Approved by the Federal Ministry of Education.Islamahad.Vidc Letter No.F.6-2/2003 dated 13 Junc,2003Government of Pakistan.Islamabad.  \nKoracademy.com  \n\n| CONTENTS   |  |\n| --- | --- |\n| No..Chapter       Page No   | No.  Chapter  \u003Cbr>Page No   |\n| 15 Homeostasis  \u003Cbr>】  \u003Cbr>16 Support and Movcments 23  \u003Cbr>17 Coordination and Control 53  \u003Cbr>87  \u003Cbr>18 Reproduction  \u003Cbr>19 Growth and Development 105  \u003Cbr>20 Chromosomes and DNA 122.  \u003Cbr>150  \u003Cbr>21 Cell Cycle   | 22 Variation and Genctics  \u003Cbr>163  \u003Cbr>23 Biotechnology  \u003Cbr>202  \u003Cbr>24.Evolution  \u003Cbr>222  \u003Cbr>25 Ecosystem  \u003Cbr>236  \u003Cbr>26 Some Major Ecosystems 250  \u003Cbr>27 Man and his Environment 264  \u003Cbr>28 Glossary   |\n\n\n| Authors   |  |\n| --- | --- |\n| Prof.Dr.A.R.Shakoori   | Prof.Dr.Abdul Majced Checma   |\n| Assoc.Prof.Hamid Saeed   | Assoc.Prof.Dr.Rass Masood Khan   |\n| Assoc.Prof.Nauman Usmani·   | Assoc.Prof.A.R.Saced   |\n| Prof.Dr.Javed Iqbal Qazi   | Asst.Prof.Javed Akhtar Wahla   |\n| .Asst.Prof.Dr.Farkhanda Manzoo  \u003Cbr>E  \u003Cbr>Dr.A.R.Shakoori  \u003Cbr>Mrs.Rehana Johar   | r  \u003Cbr>Sub.Specialist Mrs.Syeda Saira Hameed   |\n|  | Supervised by:Robecla Shabhir  \u003Cbr>ditors  \u003Cbr>Mr.Hamid Saccd   |\n\nPublishers:Hakayat Publishers,Lahore.  \nPrinter:Ishaq Al Fatah,Lahore.  \nDatay 2016tn Ediftin mprossion No.of.Copies 123c  \nk  \n15  \n# CONCEPTS INHOMEOSTASIS\n\nEach organism of a species has assumed,in evolutionary history,a specific set upof internal environment at various levels of organization suitable to its surroundings i.e.,external environment.External environment and its components fluctuate continuously,however,the organism resists and manages these changes by making adjustments to keepits own internal fluctuations within a narrow range thus protecting internal environmentfrom the harms of the fluctuations.The protection of internal environment from theharms of fluctuations in external environment is termed as homeostasis.The homeostasiskeeps the internal fluctuations in a narrow range with various control systems comparedto wider external fluctuations.  \nMost susceptible components of internal environment that may be affected byfluctuations in external environments are water,solutes and temperature.Also themechanism an organism has adapted to eliminate harmful nitrogenous wastes depends  \nupon the availability of water.The mechanism ofregulation,generally between organism and itsenvironment,of solute and the gain and loss of wateris osmoregulation.The mechanism which eliminatesnitrogenous waste is referred as excretion,whereasmaintenance of internal temperaturc within a tolerablerange is designated as thermoregulation.  \nLikewise the control systems among intracellular and extracellular internalenvironment of an organism also at cell level keep fluctuating in narrow range inintracellular,within cell membrane,compared to in extracellular(vascular and otherinterstitial fluids)environment.Here,in addition to solute and water various essentialmetabolites,hormones clc.are kept in a required range.Homcostasis does not mean tokeep a fixed internal environment as changes maintained within a specific range arenecessary for normal body functions.For example,water availability may fluctuatetremendously for the organisms in the external environment from abundant supply toalmost dry conditions,however,the quantity of water in the body i.e.internalenvironment may vary in response to abundant supply and dry condition,but in a narrowrange.The control systems would not let the body flooded with water in abundant supply  \n# HOMEOSTASIS\n\nHomeostasis is the centralrequirement in themaintenance of an organism,which compels the adaptationsin the constant changingconditions and contribute inevolutionary process.  \n2  \nand also not to dehydrate in dry conditions.Furthermor","cbCaimjdzK7Ny7rP","https://ap.wps.com/l/cbCaimjdzK7Ny7rP","pdf",51711739,291,"English","# Concepts in Homeostasis\n## Homeostasis\n## Osmoregulation\n## Balance of water and solutes","[{\"question\":\"What is homeostasis and why is it important for organisms?\",\"answer\":\"Homeostasis is the protection of an organism’s internal environment from harmful fluctuations in the external environment. It keeps internal conditions within a narrow range to support normal body functions.\"},{\"question\":\"Which internal components are most affected by external environmental fluctuations?\",\"answer\":\"The most susceptible components are water, solutes, and temperature. Their regulation is necessary to prevent damage caused by external changes.\"},{\"question\":\"What are the main mechanisms mentioned for regulation in homeostasis?\",\"answer\":\"The material describes osmoregulation for solute and water balance, excretion for removing nitrogenous wastes, and thermoregulation for maintaining internal temperature within a tolerable range.\"}]","Biology - Class 12 - Concepts in Homeostasis | PDF",1791015166,733]