...Homeostasis is the process by which body systems maintain and stabilize a relatively constant internal environment. Most homeostatic control systems adjust internal conditions by acting against changes caused by the external environment. The human body works best under certain conditions, our body temperature, blood pressure and water concentration are variables that need to be within specific ranges for us to function properly and if they fall outside of these ranges there can be dangerous consequences. The body uses homeostatic mechanisms to maintain variables close to a predetermined ‘set point’, which is the optimum, ideal value for a variable. Through homeostasis, the body is able to maintain a stable internal environment even despite...
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...Homeostasis: Homeostasis is the tendency of the body to seek and maintain a condition of balance or equilibrium within its internal environment, even when faced with external changes. The importance of having blood glucose regulated in the human body is because glucose is a sugar needed by cells for respiration. It is important that the concentration of glucose in the blood is maintained at a constant level. Insulin, a hormone secreted by the pancreas, controls blood sugar levels in the body. Diabetes is a disorder in which the blood glucose levels remain too high. This is controlled to provide cells with a constant supply of energy. The blood sugar level is controlled by the release and storage of glucose, which is in turn controlled by a hormone called insulin. Here is an example of Homeostasis when blood glucose decreases. Insulin causes blood glucose levels to decrease, as would be expected in a negative feedback system. However if an animal has not eaten and blood glucose levels decrease, this is sensed in a different group of cells in the pancreas: the hormone glucagon is released, causing glucose levels to increase. Here is a picture of a Negative Feedback loop for blood glucose levels. Which explains the process mutch clearly. We can also see that the loops are the same but in one of the loops the glucose...
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...Water Hydrolysis: Addition of H2O to break it apart. Dehydration: Removal of H2O to form a bond. Carbohydrates Monosaccharide: 2 common types Glucose (Hexopyranose RLRR), fructose Disaccharide: 3 common types glucose + fructose alpha glucocsidic bond = sucrose (table sugar) glucose + galactose beta galactosidic bond = lactose glucose + glucose = maltose Polysaccharide: 4 common types Starch: alpha 1,4 & 1,6 bonds btwn glucoses. amylose and amylopectin Glycogen: different branching than starch. Found in animals Cellulose: beta glucose polymer. Plant cell walls Chitin: similar to cellulose with extra nitrogen containing group. Fungus cell wall and exoskeleton Lipids Triglyceride 3 fatty acids attached to glycerol. Phospholipid One fatty acid in triglyceride replaced with a R containing phosphate group Steroids 4 carbon rings. 3 cyclohexane and 1 cyclopentane Proteins Primary structure AA sequence Secondary 3D shape resulting from hydrogen bonding btwn amino and carboxyl group. Alpha helix and beta pleated sheets Tertiary Hydrogen bonding btwn R groups Ionic bonding btwn R groups Hydrophobic and hydrophilic effects Disulfide bonds btwn Cysteine Quaternary Multiple tertiary structures come together. H-bond, disulfide bond, hydrophilic/phobic interactions Nucleic acids Polymer of what? nucleotides Parts of DNA Nitrogen base, 5 carbon sugar, phosphate group Structure 1' attached to base, 5' attached to phosphate group, 3' attached to another nucleotide, antiparallel Base types & number...
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...National Curriculum Statement (NCS) Curriculum and Assessment Policy Statement LIFE SCIENCES Further Education and Training Phase Grades 10-12 basic education Department: Basic Education REPUBLIC OF SOUTH AFRICA CurriCulum and assessment PoliCy statement Grades 10-12 life sCienCes CAPS LIFE SCIENCES GRADES 10-12 department of Basic education 222 Struben Street Private Bag X895 Pretoria 0001 South Africa Tel: +27 12 357 3000 Fax: +27 12 323 0601 120 Plein Street Private Bag X9023 Cape Town 8000 South Africa Tel: +27 21 465 1701 Fax: +27 21 461 8110 Website: http://www.education.gov.za © 2011 department of Basic education isBn: 978-1-4315-0578-4 Design and Layout by: Ndabase Printing Solution Printed by: Government Printing Works CURRICULUM AND ASSESSMENT POLICY STATEMENT (CAPS) LIFE SCIENCES GRADES 10-12 FOREWORD by thE ministER Our national curriculum is the culmination of our efforts over a period of seventeen years to transform the curriculum bequeathed to us by apartheid. From the start of democracy we have built our curriculum on the values that inspired our Constitution (Act 108 of 1996). the Preamble to the Constitution states that the aims of the Constitution are to: • heal the divisions of the past and establish a society based on democratic values, social justice and fundamental human rights; improve the quality of life of all citizens and free the potential of each person; lay the foundations for a democratic and open society in which...
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...1. Which of the following is the characteristic of the living thing? A. have specific shape B. have regular shape C. have organized body D. none of the above 2. Which of the followings includes in homeostasis? a. To maintain the shaped of the body b. To maintain the balance of the body c. To maintain the temperature of the body d. To keep the animal away from the body 3. Your hearts starts beating before seven month of your birth. The study of your body at this stage comes within: (a) Morphology (b) Embryology (c) Anatomy (d) Histology 4. A doctor is studying the contraction and relaxation of a heart. He is studying: (a) Morphology (b) Embryology (c) Anatomy (d) Histology 5. Study of different parts of eye is called (a) Histology (b) Anatomy (c) Physiology (d) None of these 6. A biologist removes some bones of dinosaurs from a rock. He is studying: (a) Morphology (b) Paleontology (c) Ecology (d) None of these 7. Darwin sys, “man has formed from monkey”. He talked about (a) Fossil (b) Evolution (c) Taxonomy (d) None of these 8. Kangaroo lives in Australia but buffaloes lives in Pakistan. The study of this distribution of animals is called (a) Ecology (b) Environmental biology (c) Taxonomy (d) Zoogeography 9. The study of structure of molecule of starch is called: (a) Molecular biology (b) Biochemistry (c) Morphology (d) None 10. The study of Amoeba comes with in the branch of biology: (a) Taxonomy (b) Ecology (c) Microbiology (d) None 11. The study...
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...Table of Contents Conditioning 3 Memory 14 Thought 21 Perception 25 Sensation 33 Personality Theory 39 Abnormal Behavior 49 Psychotherapy 56 Emotion 59 Motivation 62 Social Psychology 70 Intelligence 75 Physiology 78 States of Consciousness 84 Statistics 88 Human Development 91 Conditioning What are the laws of learning? What are the things that glue in our knowledge of the world? We are talking about the role of experience in shaping our lives. The rules of learning give us great adaptability. There are three basic types of learning. They are habituation, classical conditioning, and instrumental conditioning. Imagine a worm. When the tide is in, it comes out. It has extensions from its head, getting particles from the outside. So it comes out of its hole to snatch these particles. It has one fear though: seagulls. The worm is delicious to them. They see him and they eat him. The worm has a detection system wired in though. When there is a shadow, he ducks. It is a hard-wired reflex. Sometimes, however, shadows don’t mean a darn, like on a cloudy day. If it doesn’t come out because of the shadows, it will get nothing done and starve to death. Therefore, if the shadows are too frequent, it will ignore them. There...
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...TENNIS RECOVERY A Comprehensive Review of the Research Editors: Mark S. Kovacs, PhD Todd S. Ellenbecker, DPT W. Ben Kibler, MD A United States Tennis Association Sport Science Committee Project Tennis Recovery: A Comprehensive Review of the Research Copyright © 2010 United States Tennis Association Inc. ISBN 978-0-692-00528-6 Editors: Mark S. Kovacs, Todd S. Ellenbecker, W. Ben Kibler TENNIS RECOVERY A Comprehensive Review of the Research A United States Tennis Association Sport Science Committee Project Editors: Mark S. Kovacs, PhD Todd S. Ellenbecker, DPT W. Ben Kibler, MD Introduction In the last two decades, physical training and competitive opportunities have increased dramatically in junior, collegiate and professional tennis. This arose due to a multitude of factors, but much of it has stemmed from an increase in knowledge and understanding of scientifically based training programs focused on improving performance. As this focus on performance has increased, the area of recovery has received relatively limited focus. Recovery is a multi-faceted paradigm focusing on recovery from training—session to session, day to day and week to week. Recovery is also vitally important during training as well as in competition between matches and between days during multi-day tournaments. As more information is needed in the area of tennis specific recovery, the Sport Science Committee of the United States Tennis Association (USTA) sponsored an extensive evidence-based...
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