Negative feedback in living organisms Negative feedback is a principle which is used by the body in order to return systems to its normal level; it does this by turning the corrective measures off. Homeostasis uses the principle of negative feedback in order to maintain a constant internal environment. There are a number of different examples of negative feedback such as thermoregulation‚ regulation of blood glucose and the regulation of water potential. The control of the heartbeat can also use
Premium Negative feedback Insulin Feedback
Why is water important for living organisms? Water is very important in all living organisms‚ it is vital for many different things. Around 70% of our body weight is due to water. The quantity is high in organs such as lungs and brain and fluids such as blood‚ lymph‚ saliva and secretions by the organs of the digestive system. First of all water is vital in the regulation of body temperature to depending on the temperature mammals will alter the amount they sweat. If they are to warm the amount
Premium Plant Starch Photosynthesis
reduction in body temperature as energy is used up. Also‚ cells are made up of 80% water and the specific heat capacity of water means that bulky organisms have fairly stable temperatures. Support is vital to both plants and animals and often water plays a significant part in this. In plants water is responsible for making the cells of the plant turgid by osmosis and therefore providing support‚ particularly in the leaves of the plant. Animals with hydrostatic skeletons‚ for example the earthworm‚ rely
Premium Water Oxygen Plant
Objective: To study osmosis in living plant tissue. Biological principles: Water potential is the tendency for water molecules to enter or leave a system by osmosis through a differentially permeable membrane‚ while osmosis is the process in which water molecules move passively from a region of higher water potential to a region of lower water potential through a differentially permeable membrane. Therefore‚ potato cells‚ with their differentially permeable membrane‚ are selected as the medium
Premium Water Osmosis Chemistry
Discuss the Role of Hydrogen Bonding in living Organisms A hydrogen bond is an intermolecular bond and is formed when a charged part of a molecule having polar covalent bonds‚ forms an electrostatic attraction with a molecule of opposite charge‚ generally with fluorine‚ oxygen and nitrogen. Molecules having non polar covalent bonds do not form hydrogen bonds. Hydrogen bonds are classified as weak bonds as they are easily and rapidly formed and broken‚ however the cumulative effects of large
Free DNA Protein Hydrogen bond
Garfield wants the knowledge of the books to go to his brain. Basically‚ the high concentration (book knowledge) going to low concentration. (his brain) Diffusion is the process by which a substance moves‚ without energy‚ from an area of high concentration to an area of low concentration. It’s also the main method by which small molecules move across the cell membrane. Since molecules are always moving and bumping into each other‚ the more molecules are in an area‚ the more collisions there will
Premium
Why are Living Organism so Diverse ? Regardless of world’s life diversity‚ we all‚ from the ant to the whale and us humans have DNA linkage‚ which gives us the evidence for one common ancestor. The question that comes up now is how from this very primitive common ancestor did we all end up so diverse. Biologist have dedicated they life to answer this question‚ Through this essay I shall show how through different aspects life has become so diverse. Timescale Life as not evolve suddenly from its
Premium Evolution Species Natural selection
Adenosine Triphosphate‚ also known as ATP‚ is the molecule responsible for the energy that we‚ and all other organisms‚ need to survive. It is produced primarily in the processes of aerobic and anaerobic respiration by oxidative and substrate phosphorylation. 4 molecules of ATP are produced from 4 ADP and 4 inorganic phosphates in glycolysis in the cytoplasm of every cell‚ by the oxidation of a triose phosphate into two molecules of pyruvate. In anaerobic respiration these are the only 4 ATP
Premium Adenosine triphosphate Cellular respiration Metabolism
more visible in aquatic environments such as streams‚ lakes‚ and marshes. Many lakes and rivers are already acidic without the effects of acid rain. Their pH levels go up to 6 and 8. Once a stream or lake has been affected by acid rain‚ the organisms living in the aquatic environment begin to die out. The solution to decreasing the amount of damages acid rain has on the environment is to lower the sulfur
Premium Acid rain Air pollution Oxygen
Abstract Acid Rain has a lot of effects on living organisms and on the environment. This experiment has two purposes. One is to determine the acidity of rainwater in certain areas in the Philippines. Another purpose is to determine which type of area-urban or rural- is more subjected to acid rain. The experiment was done by first collecting rainwater from selected rural and urban areas. After the collection was done‚ the rainwater samples were tested using a pH meter. The results of the pH test
Premium PH Acid Acid rain