Homeostasis, Co-ordination and Control and the Excretory system

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Homeostasis,Co-ordination and Controland the Excretory system.

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Homeostasis is when a life being supports control of the internal bodily conditions to maintain the inside the “same” . It maintains things such as the organic structures temperature at around 37 grades, keeps the blood sum at around 5 litres and maintains H2O sum inside the organic structure. All these can alter due to different conditions, such as, the temperature outside or exerting doing the organic structure to “sweat” which looses H2O. Inside the human organic structure there are tonss of, “Sensors” which proctor everything. They send signals to the encephalon when something is “different” , detectors in the encephalon will so supervise the alterations and signal to effecters to do alterations if necessary.


The human organic structure temperature sits at 37 grades, whatever the temperature externally the temperature within the organic structure will ever seek to stay the same. This is controlled by what is known as the, “Negative feedback system” . There are receptors all over the organic structures skin which detect and analyse all alterations in temperature. All information base on ballss from these receptors to the hypothalamus, which is the portion of the encephalon that processes temperature ordinance.

When the organic structure gets to hot, blood vass will distend. This means the blood vass will go larger leting the blood flow to increase nearer to the surface of the tegument leting organic structure heat to get away. Equally good as this, when hot, the organic structure will besides sudate. When we sweat H2O is removed from the organic structure and evaporates onto the tegument, this consequence will chill the organic structure down somewhat. If the temperature gets to high it could do the organic structure to oversweat. If the individual isnt able to acquire liquids in them they will go dehydrated. This is known as a heat shot. When the organic structure gets to cold, blood vass will go smaller and will cut down blood flow around the surface of the tegument, this will maintain organic structure heat within the organic structure. This is known as Vasoconstriction. Quite frequently people will acquire what is called, “goosebumps” over their tegument. This is when the hairs over the organic structure go raised by the little musculuss on the tegument, the hairs will catch the air which helps to insulate our organic structure. When the organic structure temperature drops below 37degree ‘s it will typically get down to shudder, this is when the musculuss inside the organic structure start to agitate involuntarily and bring forth excess heat. If the temperature of the organic structure falls below 35degree ‘s the organic structure will endure from hypothermia, typically the organic structure will violently shudder which can take to difficulty in traveling. This can be treated by warming the individual up.316

Around 50-75 % of the human organic structure consists of H2O. In babes its higher at around 75 % to 78 % dropping as they get older. We must ever be in-taking liquids to maintain our H2O degree up as we can egest H2O though things such as perspiration, urinating and take a breathing out H2O vapor. We take in H2O from nutrient and drink. The human organic structure NEEDS H2O to populate. Cells within the organic structure need H2O to go through through their membrane lodging needed partials inside them. Water helps to digest nutrient, carry waste merchandises, sends electrical messages amongst cells, regulates organic structure temperature and lubricates articulations. The H2O degrees must be kept at the right balance and this is done through the kidneys. The kidneys are one of the major variety meats of homoeostasis, the human organic structure has two kidneys found in the abdominal pit ( below the ribcage ) .They regulate waterloss in the organic structure, blood goes through the kidneys and is filtered. Kidneys produce urine, this is the waste of “filtered” molecules of H2O etc.. go forthing the organic structure. Around 180 liters of H2O is processed through the kidneys on a day-to-day footing. The remains of what was filtered and non secreted from the organic structure is so redistributed across the organic structures circulatory system. Kidneys produce urine at different concentrations which maintain H2O balance. When the organic structure is dehydrated and we intake more liquids the kidney will filtrate and maintain the bulk of liquid processing through it. Any urine that does go out the organic structure will be more concentrated looking darker in coloring material. Whereas if we are to the full hydrated and imbibe more fluids than our organic structure needs the kidney will treat the liquids and filter out the bulk, it will be really diluted and will be more in measure than when your dehydrated. The kidneys H2O balance can alter harmonizing to temperature, exercising, fluid consumption and salt consumption.308Within the organic structure we require a certain volume of glucose ( Sugar ) in order to make Andesine triphosphate ( ATP ) , energy within the organic structure. ATP is of import as it’s the lone energy beginning used by cells in the encephalon and nervous system. ATP degrees will ever be altering ; therefore the organic structure must modulate its blood sugars through Sugar homoeostasis. Excessively much sugar could ensue in a high PH degree in your blood, which breaks down sugars into energy without 02 doing acids. This makes blood more acidic and disturbs the balance, therefore insulin is needed. This homeostasis is regulated by two endocrines, Insulin and Glucagon. Insulin and Glucogon are protein endocrines with a half life, they need to be quickly produced to keep a changeless homoeostasis.

This all happens within the pancreas, inside the pancreas are tonss of receptors which monitor sugar degrees within the blood stream. Insulin ‘s chief occupation is to diminish the blood sugar degrees, insulin besides synthesizes fatty acids and musculus tissue and conveyances ( k+ ) , which is responsible for doing the electric pulsations in your nervus system that transmits signals to your encephalon and musculuss. Insulin is produced by the beta cells of the pancreatic islets when there is a high blood sugar. When the degrees of blood glucose bead the production of insulin will besides take down. Whenever the blood glucose degrees become elevated, for illustration when we have merely eaten, the production of insulin will go higher once more. This will happen because of Parasympathetic stimulation from the nervous system. During this stage insulin degrees in the blood addition and sugar degrees lower.

Glucagon is the antonym of insulin, it will increase blood sugar degrees and is secreted from the pancreas when blood glucose gets low. It’s produced in the alpha cells of the pancreatic islets. In the Sympathetic stimulation of the nervous system glucagon will assist to promote the sums of blood glucose in the blood watercourse.

There is usually around 70 – 99mg of glucose in our blood, 70-120mg after eating. Diabetes is a upset some people can acquire when the glucose degrees in the blood are excessively high and remain so. Treatment for this is an insulin shooting. In type 2 diabetes the individuals cells that detect certain parts of sugar, which will imitate the production of insulin will go damaged or destroyed hence they won’t be merely produced. So intervention for this is a lifestyle alteration by altering diet and exerting on a regular basis, type 2 can be cured through this unlike type 1.


All responses to any stimulus semen from the cardinal nervous system ( CNS ) . The cardinal nervous system consists of the Brain and the spinal cord which react to information received from senses. The encephalon is rather frequently compared to the homo ‘s processor and memory of a computing machine. The forepart of the encephalon is responsible for having and treating information ie/ thought and commanding motor maps ( motor tract ) . The mesencephalon is responsible for audio and ocular responces whereas the rhombencephalon contains all the centripetal infromation ( Sensory pathway ) . This is responsible for commanding things such as external respiration, bosom rate and digestion and is attached to the spinal cord. The spinal cord is a group of nervus fibers connected together which lead up to the encephalon. They appear in a cylinder form and run down the Centre of the spinal column towards the lower dorsum. The spinal cord transmits informations from the organic structure organs to the encephalon. The Peripheral Nervous system ( PNS ) consists of two types of cells. Sensory and motor nervous cells and is divided into Somatic and Autonomic nervou system. The Somatic nervous system controls the skeleton musculus whereas the Autonomic nervous system controls nonvoluntary musculuss.194Similarities and Differences between Endocrine system and Nervous system

Hormone System

Nervous System


Both the Endocrine system and the Nervous system rely on the release of chemicals, such as Epinephrine, around the organic structure to work. They are both regulated by the negative feedback system and both work to supervise and modulate activities inside cells, variety meats, tissues etc… they respond to external and internal environments to assist keep the perfect homoeostasis.


One of the chief differences between the Endocrine and Nervous system is, the Endocrine system works on chemical stimulations to go through signals around the organic structures cells and variety meats. It is made up of a set of secretory organs which secrete endocrines. Every sword lily is responsible for a different country of the organic structure and they use the circulatory system to convey signals around the organic structure. Communication is transmitted easy across long distance and their consequence becomes longer enduring.

Whereas the nervous system relies on electrical pulsations to go through the signals. Is made up of a aggregation of cells called Nerve cells which are split into two systems, the Central nervous system ( CNS ) and the Peripheral nervous system ( PNS ) .The nervous system used these Nerve cells to convey signals. Communication is transmitted fast and across shorter distances and are shorter in life.

193The excretory system is the procedure of the organic structure taking waste through elimination. It removes waste produced through the homoeostasis rhythm and In making so it maintains a changeless homoeostasis. The bulk of variety meats in the human organic structure produce a metabolic waste and thrus the whole organic structure relies on the elimination system to keep a perfect equilibrium. The major parts of the organic structure involved in this procedure are the ; Kidneys, Ureters, Urethra, Bladder, Skin, Lungs, Large bowel and the Liver.

The urinary system is the major portion of the excretory system. The kidneys are two bean shaped variety meats located below the ribcage, in the center of the human back. They are processors which process through blood and filter out around 2liters of waste merchandises and H2O every twenty-four hours. All the waste will go urine which is passed through the Ureter to be stored in the vesica. When you go to the lavatory, urine exits the organic structure through the urethra tubing. The 2nd major portion of the urinary system is based in the liver, one of the largest variety meats in the human organic structure. Its found on the right side of the organic structure and is the chemical human dynamo within the organic structure. Its intent is to detoxicate and breakdown any foreign chemicals that might come in our organic structures. The liver produces something called gall, which breaks down fats into waste and useable fats. Around 5ft in lengh, the big bowel sits inside our tummy and conveyances solid waste to be excreted. It can take up to 24 hours for nutrient to go through a individuals big bowel. The lungs are responsible for respiration, cellular respiration produces C dioxide which is a waste merchandise and is eliminated from the organic structure through halitus. Finally the tegument, a important portion of the excretory system eliminates perspiration from the organic structure, perspiration contains salt and is a metabolic waste.310

Mentionsabpi, ( 2012 ) , Homeostasis – Kidneys and H2O balance [ online ] . Available: & lt ; hypertext transfer protocol: //www.abpischools.org.uk/page/modules/homeostasis_kidneys/kidneys2.cfm? coSiteNavigation_allTopic=1 & gt ; [ 23/03/2015 ] BBC Bitesize, ( 2014 ) , Keeping Water Balance [ on-line ] . Available: & lt ; hypertext transfer protocol: //www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_pre_2011/homeostasis/waterbalrev1.shtml & gt ; [ 23/03/2015 ] ForDummies, ( 2013 ) , Why your organic structure needs H2O [ online ] . Available: & lt ; hypertext transfer protocol: //www.dummies.com/how-to/content/why-your-body-needs-water.html & gt ; [ 23/03/2015 ] Biomed, ( 2014 ) , Insulin.Glucagon [ online ] . Available: & lt ; hypertext transfer protocol: //biomed.brown.edu/Courses/BI108/BI108_2002_Groups/pancstems/stemcell/insulin_glucagon.htm & gt ; [ 23/03/2015 ] About Education, ( 2012 ) , Nervous System [ online ] . Available: & lt ; hypertext transfer protocol: //biology.about.com/od/organsystems/a/aa061804a.htm & gt ; [ 23/03/2015 ]

Mcwdn, ( 2011 ) , Excretory system [ online ] . Available: & lt ; hypertext transfer protocol: //www.mcwdn.org/body/excretory.html & gt ; [ 23/03/2015 ] Distance Learning Center, ( 2014 ) , Homeostasis, coordination and Control and the Excretory System [ online ] .Available: & lt ; hypertext transfer protocol: //www.distancelearningcentre.com/access_2014/materials/Biology/Homeostasis_and_Excretory_Systems/Homeostasis, _Coordination_and_Control, _and_the_Excretory_System.pdf & gt ; [ 23/03/2015 ]

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Homeostasis, Co-ordination and Control and the Excretory system. (2016, Dec 05). Retrieved from


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