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Describe the distribution of water in the body and the function of constituents of body fluids. Explain the contributions of water and solutes to the maintenance of a constant internal environment of cells.

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Introduction

P3, m3 describe the distribution of water in the body and the function of constituents of body fluids. Explain the contributions of water and solutes to the maintenance of a constant internal environment of cells. Constituents of body fluid. The main component of all body fluids mainly consists of water; of this 90% include blood plasma, lymph, urine, saliva, digestive juices, bile, cerebrospinal fluid and also tissue fluid. To ensure the flow of fluids water plays an important role for the onward progression of these fluids, without water this would not be possible. Water also allows substances to be transported around the body (e.g. red blood cells) as well as supplying the medium that is needed for metabolic reactions top take place (e.g. respiration) Water that is made as a by product of metabolic reactions this is not enough to sustain life, therefore the water has top be taken in as part of the diet. Water is always being transported between the fluid compartments of the body. Glucose Urea Metabolic reactions produce surplus amino acids that can then be converted into the waste product urea through the process of deamination in the liver. ...read more.

Middle

Acid-base balance PH Ph measures the amount of Hydrogen ions present in a solution. pH scale ranges from the values 1 to 14. The number 7 in the scale is the natural point and any other numbers between 1 and 7.Therefore the lower the number it would mean that there is a high acid . Importance of maintaining the hydrogen ion concentration in body fluid Buffer systems are in place in order to maintain and stabilise the pH of cellular/body fluids. Metabolic activities are controlled by enzymes, which can be described as organic catalysts. Solvent and surface tension For many substances in the body water is an excellent solvent. Water has a high surface tension; which is evident when it comes into contact with air. Solutes The cell membrane is a partial permeable barrier that allows only certain molecules through the bilayer, therefore some material due get passed due to the cell evaluation. There are two ways for the energy to get out, that are kinetic and potential. When the water molecules move according to the disparity, this where the energy is found from where to begins to where it ends. ...read more.

Conclusion

The tissue fluid which is known as the intercellular and the interstitial fluid have the majority component f the extracellular fluid as it has 11 litres compared to the 3 litre of plasma. The lymph has 10% of the tissue fluid that form in the remainders of the plasma. Role of tissue fluid in homeostasis In the homeostasis the tissue fluid has vital role as the fluid is pushed out of the arterial end of the capillary by the blood pressure then has remain after the bloods been pushed out through the muscular arterioles and capillaries. During this stage there are low carbon dioxide and high dissolved oxygen concentration as well as being filled up with other nutrients like amino acid, salt and glucose. The tissue fluid flows around the cells and in between giving out the raw materials by osmosis, facilitated diffusion and diffusion etc. The waste metabolic material gets passed in the opposite direction to the cells and then into the tissue fluid. Therefore if allowed to accumulate, this would or can cause disruption that can lead to the cells dying and then death can occur. Sources used BTEC health and social care book 1 (from unit 13 section) OCR Biology A2 book (from unit 1) ?? ?? ?? ?? ...read more.

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