direction. Diffusion takes place within the body through the cell membranes. Although these are freely passable to the diffusing molecules providing the barrier are thin. In the lungs there are two simple squamous epithelial cells which separates the dissolved gases in the alveoli from the blood in the pulmonary capillaries. No source of energy is required for diffusion of molecules. See diagram of diffusion below Some of the materials which diffuse through the cell membrane by a related process
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The Uses of water in Living Things Topics I have chosen to cover: - Osmosis & Water potential - Condensation & Hydrolysis Reactions - Digestion – the importance of water - Blood and tissue fluid To emphasise the sheer importance of water in living things and to put the content of this essay in to perspective‚ I am firstly going to inform you that the human body is approximately 50-75% water. Without water our body would be unable to successfully perform the numerous complex reactions and
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BIO/101-PRINCIPLES OF BIOLOGY DECEMBER 8TH 2013. JEBA INBARASU Organism Physiology is the method in which many diverse living organisms are considered to have developed from earlier forms during the history of the earth that can be defined as Evolution. Several organisms have evolved as a result of environmental changes within their habitats. Example is a diagram of a whale and details about how the whale has evolved
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One major ways for the survival of all organisms is called adaptation. When it comes to Intertidal Organisms their no different. Intertidal Organisms inhabit the specific area between low tide and high tide next to the rocks on the coasts‚ marshes and or wetlands. Theses organisms can be from sea stars to types of algae and many more. As the tides come in‚ the habitat of intertidal organisms are sprayed with salt water. Then after the tide depletes‚ the habitat is exposed to the sun. It makes
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Chapter 1: Classification and Characteristics of Living Organisms Organisms - An individual living thing‚ such as an animal or a plant‚ is called an organism. There are seven characteristics of living organisms – Nutrition Nutrition is the process by which organisms obtain energy and raw materials from nutrients such as proteins‚ carbohydrates and fats for growth and repair. Photosynthesis is the process of nourishment of green plants. Digestion is the process of nourishment of green
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washed off into rivers and lakes. The ecological effects of acid rain are always 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
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How microscopes have contributed to our understanding of living organisms There are 2 types of microscopes these are; light microscope and electron microscope. Light microscopes use a beam of light however the resolution is lower than the electron microscope so the image is not clear‚ however they can view living organisms. These types of microscopes are used in schools to view simple cellular structures‚ which is good to teach simple biology Mitosis and meiosis can be seen with light microscopes
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1. Identify each of the following statements as either true or false. If false‚ explain why. (a) Viscosity is a measure of how easily a fluid flows. (b) Although important‚ fluids are not essential to many living things. (c) A meniscus forms when water particles adhere to the sides of their container. (d) Buoyancy‚ like water pressure‚ acts in all directions. 2. Describe the relationship between mass‚ volume‚ and density of matter. 3. Use the particle theory to explain the differences between
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Ways in which living organisms differ from each other There are many ways in which living organisms differ from each other. In this essay I will discuss the various ways of which this occurs. There are two different types of cells‚ there are prokaryotes and eukaryotes. Within eukaryotes there are different structures and similar structures. For example; in a plant cell they have a nucleus‚ mitochondria an ER‚ and a Golgi body. These are the same as animal cells; however they differ because plants
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Alterations in Fluids‚ Electrolytes‚ and Acid-Base Balance Composition & Compartment Distribution of Body Fluids ← Body fluids are distributed between the intracellular fluid (ICF) and extracellular fluid (ECF) compartments. The ICF compartment consists of fluid contained within all of the billions of cells in the body. It is the larger of the two compartments‚ containing approximately two thirds of the body water in healthy adults. ← The remaining one third of body water is in the
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