Sleep Cycle You may be surprised to learn that we still don’t fully understand why people need to sleep and what purpose sleep serves. Doctors and researchers had thought many years ago that sleep was a single state of being that was distinguished from waking. However‚ we now know that sleep itself is divided into two distinctly different states: REM‚ or rapid eye movement sleep‚ and non-REM sleep. Non-REM sleep is the state of sleep entered when we first start to doze off. Non-REM sleep state
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Cell: The cell is the basic structural‚ functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing‚ and are often called the "building blocks of life". Discoverer: The cell was discovered by Robert Hooke in 1665. The cell theory‚ first developed in 1839 by Matthias Jakob Schleiden andTheodor Schwann‚ states that all organisms are composed of one or more cells‚ that all cells come from preexisting cells‚ that vital functions
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The respiratory system provides life giving oxygen to cells through inspiration of air; at the same time‚ it removes carbon dioxide waste from cells through expiration‚ which can be lethal if not ventilated properly. This process is called pulmonary ventilation and is facilitated by three major components of the respiratory system: airways‚ lungs‚ and muscles; all of which play a vital role in the respiratory cycle and homeostasis. The respiratory cycle begins in the airways and during inhalation
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occur. These changes include increased heart rate‚ blood pressure and secretion of stimulatory hormones. Ones body prepares itself in stressful situations to either stand ground and fight or to flee from the situation. Walter Cannon called this stressful reaction the fight-or-flight response (Greenberg‚ 1999). There are different ways in which one can experience stress and it is important to remember that stress is an essential part of life. Not all stressful situations are negative. Receiving
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Safety Lifecycle Management In The Process Industries The development of a qualitative safety-related information analysis technique a Copyright © 2002 by B. Knegtering CIP-DATA LIBRARY TECHNISCHE UNIVERSITEIT EINDHOVEN Knegtering‚ Berend Safety lifecycle management in the process industries : the development of a qualitative safety-related information analysis technique / by Berend Knegtering. – Eindhoven : Technische Universiteit Eindhoven‚ 2002. – Proefschrift. ISBN 90-386-1747-X NUGI
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Red Cross - It is an international organization concerned with the alleviation of human suffering and the promotion of public health; the world-recognized symbols of mercy and absolute neutrality are the Red Cross‚ the Red Crescent‚ and the Red Crystal flags and emblems. - It is an international humanitarian organization (Red Cross Society) formally established by the Geneva Convention of 1864. It was originally limited to providing medical care for war casualties‚ but its services now include
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Cell Specialisation All cells are designed to perform a particular job within an organism‚ that is‚ to sustain life. Cells can become specialized to perform a particular function within an organism‚ usually as part of a larger tissue consisting of many of the same cells working together for example muscle cells. The cells combine together for a common purpose. All organisms will contain specialised cells. There are hundreds of types of specialised cells. Below is listed some of the major ones
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Written Assignment Unit 4 ENVS 1301 – AY2018-T1 WATER CYCLE Collins Addo INTRODUCTION Water is a very important need in life. Species get water to sustain their lives‚ water is used domestically and industrially. Water is the most essential compound for Earth’s life in general. Human babies are approximately 75% water and adults are 60% water. Our brain is about 85% water‚ blood and kidneys are 83% water‚ muscles are 76% water‚ and even bones are 22% water. (Dorsner‚ 2017) About 70% of Earth’s surface
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Several things occur in the Krebs cycle. It takes place in the mitochondrial matrix. The electron transport chain is located in the cristae of a mitochondria. The enzymes used during the Krebs cycle are found within the mitochondrial matrix excluding succinate dehydrogenase‚ which is bound to the inner mitochondrial membrane. Protein complexes located in the inner membrane perform the transfer and the gradual release of energy is used to pump protons into the intermembrane space of the mitochondria
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A cycle is defined as any complete round or series of occurrences that repeats or is repeated in the same order and at the same intervals. The natural existence of cycles is highly important without cycles resources would run out and organisms would die. The amount of carbon nitrogen and oxygen on the earth is fixed‚ they can exists in different forms but no more may be added. So that these don’t run out they are cycles so they may be reused. Photosynthesis and respiration are the reverse of each
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