Homeostasis In Mammals.
HOMEOSTASIS IN MAMMALS Homeostasis is method by which an organism controls it internal environment. It does this by keeping the level of a number of substances in the body at a constant level (at a set point). If levels of substances move away from that set points then corrective mechanisms take place which restore the level to the set point. In this essay I am going to talk about three types of Homeostasis, these are: glucose regulation, osmoregulation and thermoregulation. Glucose regulation is simply the regulation of the level of glucose in the blood. Thee amount of glucose in the blood is commonly referred to as the blood sugar level. A rise in the blood sugar level (caused, for example by eating a meal) will be detected by the pancreas and the insulin-producing tissue, called the islets of Langerhans release the hormone called insulin, this causes increased absorption of glucose by cells, due to the increased permeability of cell membranes. This glucose is then converted by cells into glycogen for storage in the liver and muscles. Should the blood sugar level be too low, which could be due to strenuous exercise, then glucagon is secreted which results in the conversion of glycogen to glucose. Someone that suffers from diabetes mellitus is unable to control their blood sugar level, in one form of diabetes no insulin is secreted and regular insulin injections are needed
What is homeostasis?
What is Homeostasis? Homeostasis is all about keeping a steady balance in the internal environment. This balance has to be at an optimum range of level as temperature, respiration which is carbon dioxide and oxygen, blood glucose and blood pressure and pulse. The human body needs to have a balance of everything by regulation. The internal environment is the conditions inside the human body. The conditions stay mostly constant despite any changes in the outside environment such as temperature. The skin, kidneys, liver, endocrine system, nervous system and sensory system each play a part in retaining the internal environment. The external temperature can change depending on each day and the season we are in. The temperature could be 40 degrees; however, the human body temperature would stay the same which is about 37 degrees. By sweating, vasodilatation, vasoconstriction and shivering the humans body temperature stays the same. When people exercise, temperature of the body will rise; the sweat glands are then activated and secrete sweat onto the skin. When the sweat is then evaporated then heat is taken from the body and the temperature of the body decreases. The things inside the human body which need to be kept the same are: Carbon Dioxide: any carbon dioxide in the body which is extra needs to be removed because if not then the body will become acidic. Carbon dioxide
Feedback in teaching
With Specific reference to augmented feedback and intrinsic feedback, critically debate the role and importance of feedback in dance teaching and learning. ...feedback contributes to learning and this effect has received the most attention throughout the history of motor learning research. It contains information about success in goal achievement and allows subjects to know their error rate Swinnen 1996 p.51-52 The interpersonal relationship between the learner and teacher provides opportunity for the comprehension and achievement of new skills. It is within this relationship that feedback corresponding to the acquisition of a skill occurs. Feedback in dance teaching and learning has been a topic of abundant research and examination. Appendix A illustrates the types of feedback that will subsequently be discussed. The role and importance of feedback to a students skill attainment, in specific relation to augmented feedback and intrinsic feedback provides the following debate. Independently from the teacher, students are able to provide themselves with intrinsic feedback. Task-intrinsic feedback can be defined as ''the sensory - perceptual information that is a natural part of performing a skill'' (Magill 2007 p.269). Each sensory system is capable of providing this manner of feedback. Visual feedback is possible for a dance student as they can observe themselves
The role of feedback
Discuss the role of feedback in the learning of skills In this assignment I am going to show how different styles of feedback and how they can benefit the leaning of skills for a team, individual and racquet sports. There are many different types of feedback, which can help an individual learn skills. Feedback is defined as 'a reaction or response to a particular process or activity' (http://dictionary.reference.com/browse/feedback, accessed 16th march 2007) This means that when a skill is learnt, a response is made to the performed skill. It is said that learning can't occur without feedback as otherwise we are not told what is right and wrong and feedback helps us to learn from our mistakes. Feedback is also linked to the information-processing model. There are two models for information processing Whiting's model and Welford's model. Within each of these models there are 3 stages of processing which I shall show in the table below. Stimulus identification Response selection stage Response programming stage In this part of the process the sense organs such as your ears and eyes pick up information from the surrounding environment and recognise what they are. E.g. netball player is about to catch the ball detects the movement of the ball, the speed and its direction. In this stage it involves making a decision from the information just collected. E.g. the
Homeostasis is the process which maintains a constant internal body environment. The process relies on the mechanisms which keep this internal environment within very narrow limits, despite fluctuating external conditions
Homeostasis Homeostasis is the process which maintains a constant internal body environment. The process relies on the mechanisms which keep this internal environment within very narrow limits, despite fluctuating external conditions. This is achieved by a process called negative feedback to maintain the set point. Whenever a change occurs in a system, receptors detect the change and activate the effectors, which automatically cause a corrective mechanism to start. This brings about changes of a factor to restore the system back to normal. The bigger the change of a factor from its set point, the larger the corrective mechanism. However an efficient homeostatic system minimises the size of the fluctuations about the set point. This process ensures that cells within the internal environment of an organism are constantly surrounded by a fluid with temperature, pH and water potential which is relatively constant despite changes which try to alter them. This is necessary to ensure that enzymes controlling reactions are not denatured by extremes of these conditions and osmotic problems are avoided by a constant water potential. There are many examples where homeostasis is the key reason for the correct functioning of a factor: * Breathing - muscle contracting is controlled by nerve impulses from the medulla in the brain, to the diaphragm and intercostals muscles. Receptors, in
Investigating Two Aspects of Homeostasis
Investigating Two Aspects of Homeostasis Aim: The aim of our experiment is to find out the relationship between our sweat production and heart beat that occurs before and after vigorous exercise. When we do vigorous exercise our heart beats faster because your body can't supply enough oxygen to your muscles, therefore anaerobic respiration starts, (what happens when there is no oxygen available from the lungs) this builds up lactic acid in the muscles. When high level of CO2 and lactic acid are detected in the blood, (by the brain) the pulse and breathing rate increase to rectify the situation. Introduction: Homeostasis covers all the function of your body to maintain a constant internal environment. Homeostasis controls the removal of CO2 and urea, the lungs helps removes CO2 and the kidneys removes the urea in urine and adjust the ion and water content of blood, the kidney also controls the ion, water, sugar and temperature. Sugar level is adjusted by the liver and pancreas. Aerobic respiration is what happens if there is plenty of oxygen available. Aerobic respiration converts glucose into energy, Glucose + Oxygen Carbon Dioxide + water + Energy, Or C6H12O 6CO2 + 6H2O + Energy Anaerobic Respiration is what happens if there's no oxygen available. Anaerobic respiration happens when you do vigorous exercise and your body cannot supply enough oxygen to your muscle,
Homeostasis is the technical term for the maintenance of a constant environment inside the body, particularly concerning breathing rate, body temperature, heart rate and blood glucose levels.
Homeostasis Homeostasis is the technical term for the maintenance of a constant environment inside the body, particularly concerning breathing rate, body temperature, heart rate and blood glucose levels. Inside out cells their thousands of chemical reactions happening every second, these reactions keep us alive. However, in order for our cells to work properly they need certain condition, which is where homeostasis comes into place by maintaining a constant environment. Negative Feedback System Negative feedback occurs when an important variable, such as body temperature lowers or increases from the accepted range, which then triggers a response so that it can then return the variable back to its normal range. Negative feedback systems require: * Receptors to detect change * A control centre to receive the information and process the response * Effectors to reverse the change and return it to the original state When a receptor detects a change in the system, either an increase or decrease, which affects the constant rate of the body processes, the information is sent to the processing centre. Here the information is received and processed, then a command is sent to the body's effector. The effector brings about a change which returns the constant rate of the processors. Heart Rate The heart has two nervous systems that operates it- the sympathetic and the
P5- Explain the concept of homeostasis with reference to the control of heart rate, breathing rate, body temperature and blood glucose levels.
M. Ugiagbe Omi Chowdhury CU149521 Unit 5- Anatomy and physiology for Health and Social Care P5- Explain the concept of homeostasis with reference to the control of heart rate, breathing rate, body temperature and blood glucose levels. In this assignment I will be explaining the concept of homeostasis with reference to the control of heart rate, breathing rate, body temperature and bloody glucose levels. Firstly, I will start this assignment off by explaining what homeostasis is. Homeostasis is the tendency toward a relatively stable equipoise between symbiotic elements, especially as maintained by functional processes. http://www.google.co.uk/#hl=en&q=homeostasis&tbs=dfn:1&tbo=u&sa=X&ei=sIhIUfPzGeiW0QWa5oHACw&sqi=2&ved=0CCwQkQ4&bav=on.2,or.r_qf.&fp=4e753e884ed8bf36&biw=884&bih=537 A simple illustration of homeostasis is when we get really cold in winter, our body starts to shiver and by shivering the body maintains heat and warm us up. Another example may be that an individual may feel hot from doing an intense workout or simply walking in really hot heat, our bodies maintain homeostasis by sweating, this helps us to cool down and maintain body temperature. Negative feedback is the mechanism in which the body sustains conditions within specific perimeters. The body does this by conflicting an alteration that deviates from the norm. In other words, deviation
Homeostasis
Homeostasis Control of heart rate Describe the difference between the sympathetic and the parasympathetic branches of the autonomic nervous system. The difference between the sympathetic and parasympathetic nerves lies in the fact that they are often in opposition to one another. Stimulation by the parasympathetic system decreases the contractions of the heart, while the sympathetic does the opposite. If both systems are required for an organs function, the two systems, parasympathetic and sympathetic, act simultaneously, although one may operate faster than the other. This action of the two nervous systems has been compared to both the accelerator and brake pedals of a car, being pushed down at the same time. These two systems are highly intricate, and require a finely tuned nervous system that medical science is still learning about. The sympathetic leading stimulation, the fight or flight reaction and the parasympathetic involving relaxation, recovery and digestion. The sympathetic nervous system is activated by any stimulus over an individual’s threshold (and the threshold can vary enormously), including feelings, and by noise, light, drugs and chemicals (e.g. caffeine).In response to the stimulus an immediate anticipatory state is generated by the release of adrenaline. This causes the heart to beat more quickly and strongly, increases blood supply to the muscles,
Describe the concept of homeostasis and the homeostatic mechanisms that regulate heart rate, breathing rate, body temperature and blood glucose levels.
Saira Iram Shaukat Unit 5- Senzenni Assignment 4 Homeostasis-P5 P5) Describe the concept of homeostasis and the homeostatic mechanisms that regulate heart rate, breathing rate, body temperature and blood glucose levels. Definition of Homeostasis The actual word homeostasis means "steady state". Homeostasis describes how the body regulates its process to keep its internal conditions as stable as possible. Homeostasis is necessary because human cells are efficient but very demanding. The phrase "steady state" is a bit confusing; the conditions inside our bodies are not constant but are kept within a narrow range. Some factors such as core temperature and blood pH change slightly while others such as blood glucose vary considerably throughout a normal day without producing any harmful effects. A very brief description of homeostasis is that it is the maintenance of a constant internal environment in response to a change in external environment. Internal environment The conditions that prevail within the body of an organism, particularly with respect to the composition of the tissue fluid. To function properly they need to be bathed in tissue fluid that can provide the optimum conditions. Nutrients and oxygen must be delivered and waste needs to be removed. To maintain the internal environment there are 3 things that need to be done: * Organisms keep conditions in
