...EFFECTS OF CAFFEINE ON AEROBIC CAPACITY Introduction Caffeine is one of the most consumed drugs in the world today, with Australians consuming an estimated 232mg per day on average (Heckman et al. 2010). It is found in many beverages, including coffee, tea, and many energy drinks. Studies suggest the drug increases wakefulness and apparent alertness due to the effects it has on one’s body - caffeine is absorbed within a period of 45 minutes after ingestion, and binds to adenosine receptors located in the central nervous system, blocking the neurotransmitter adenosine which causes neural activity - the rate of firing of central neurons - to slow. Since adenosine is unable to bind to the receptors, the neurotransmitter is unable to slow neural...
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...Stimulants are substances that will keep a person alert and active when they would otherwise be tired. Depressants do the opposite. They help someone calm down and relax. Both types of these drugs can be beneficial or detrimental, depending on how they are taken or on the dose. Caffeine is a stimulant and is the most widely used psychoactive drug in the world. It is used in many things, including: coffee, tea, soft drinks, chocolate, kola nuts, and some medicines. Caffeine can have many effects on the body's metabolism. It can also stimulate the central nervous system, which would make someone more alert and energetic. People tend to believe that the caffeine in what they are taking is actually beneficial, but that is not always the case. There...
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... ABSTRACT: The consumption of energy drinks is rapidly increasing, as demonstrated by their large market growth. The targeted demographic group is teenagers, young adults, 18 to 34 y old; although expansion into nontraditional markets is also occurring. It is claimed that energy drinks can offer an increased energy boost related to their ingredient profile of caffeine, taurine, herbal extracts, and vitamins. Research suggests that energy drink formulations, in addition to increasing energy utilization, may also improve mood, enhance physical endurance, reduce mental fatigue, and increase reaction time. However, in most cases, the corresponding mechanisms of action are not clear. In addition, concerns have been raised over their safety and with a currently weak regulatory environment, efforts need to be made to ensure consumer safety. The objective of this article is to review the current U.S. energy drink market with emphasis on its market size, target demographic, active ingredients, potential benefits, safety, and regulations. Introduction Energy drinks refer to beverages that contain, besides calories, caffeine in combination with other presumed energy-enhancing ingredients such as taurine, herbal extracts, and B vitamins. They first appeared in Europe and Asia in the 1960s in response to consumer demand for a dietary supplement that would result in increased energy (Reissig and others 2009). In 1962, a Japanese company, Taisho Pharmaceuticals, launched Lipovitan D, one...
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...contract and release bile into the duodenum. 7. Food passing from the stomach through the small intestine would pass first into the duodenum, then the jejunum, and lastly the ileum. 8. The movement of chyme through the small intestine is increased by parasympathetic impulses and inhibited by sympathetic impulses. Matching Questions 9-13 pertain the key below: a. primary or deciduous teeth b. incisors c. crown d. palatine tonsils e. pharyngeal tonsils 9. Useful in biting food. 10. Also are called adenoids. 11. Found on both sides of uvula. 12. Portion of a tooth that projects beyond the gum. 13. Usually appear between the ages of 6 months and 2 1/2 years. Multiple Choice 14. The effects of parasympathetic nerve impulses on the alimentary canal are __________ and sympathetic impulses are _____________. a. stimulative or cause increases in activity; inhibitory or slow down activity. b. varied with most of the activity being inhibitory; inhibitory all the time. c. not known; integrative or integrates all the activities of the canal. d. inhibitory or slow down...
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...independently and in association with the metabolic syndrome. Impaired insulin sensitivity has been documented in those known to be at risk for diabetes, such as normoglycemic first-degree relatives of people of T2DM, and women with history of gestational diabetes. Although present in most people who developed T2DM, insulin resistance is generally present for many years before changes in blood glucose concentrations are evident. Despite possible influences from genetic and perinatal factors, diet and physical activity are likely to have greater and overriding influence in generation of the metabolic syndrome and T2DM. Dietary intakes of vegetable fat, polyunsaturated fatty acid, dietary fiber (particularly cereal fiber), magnesium, and caffeine are significantly inversely correlated and intakes of trans fatty acid and heme-iron, glycemic index, and glycemic load are significantly positively correlated with the incidence of type 2 diabetes (Murakami K et al J Nutr Sci Vitaminol (Tokyo) 2005; 51:292-310). Studies have shown a significantly decreased risk for T2DM with the higher consumption of grain (particularly whole grain), and significantly increased risk with processed meat consumption (J Nutr Sci Vitaminol (Tokyo) 2005; 51:292-310). Increased obesity is associated with insulin resistance. Other important factors contributing to insulin resistance include accumulation of omental fat and fat in the myocellular compartment, both of which can exist independent of degree of...
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...Nutrition test 1 Nutrition- study of nutrients in food and how body handles them: ingestion, digestion, absorption, metabolism, storage, excretion Diseases that have a strong correlation with diet: heart disease, malignant neoplasm, cerebrovascular diseases, DM, aspiration pneumonia Nutrient- substance obtained from food that is needed by the body for growth, maintenance, and/or repair Energy providing nutrients (provide calories): * Carbohydrate – 4 Kcal * Protein – 4 Kcal * Fat – 9 Kcal *alcohol – 7 Kcal Non energy providing nutrients (just as important): * Vitamins * Minerals * Water Dietary Reference Intakes (DRI): * Recommended Dietary Allowances (RDA)- 2 % margin of error, used as a goal for individual, intake sufficient to meet/exceed nutrient requirement for 98% of healthy ppl in a particular stage of life and gender group * Tolerable Upper Intake Level (UL)- highest amount of nutrient intake that will not pose a risk for adverse health effects, higher doses likely to cause toxicity, not available for every nutrient * Estimated Average Requirements (EAR) – level that indicates that the needs for 50% of those consuming that amount will be met; needed to set RDA * Adequate Intake (AI) – average amount a group of healthy ppl consume, not scientifically based, cannot provide EAR or RDA Dietary guidelines for Americans – based on ages 2 +, promote health and prevent chronic diseases. Done by the ISDA and USDHHS every 5 years 6 principles...
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...GI and Diabetes Exam Study Guide Tube Feeding – (enteral nutrition) refers to the administration of a nutritional balanced liquefied food or formula through a tube inserted into the stomach, duodenum, jejunum. It is used to provide nutrients via the GI tract either alone or as a supplement to oral or parenteral nutrition. - Nasogastric (NG) Tube – is most commonly used for short-term feeding problems. Other means of feeding are; esophagostomy, gastrostomy or jejunostomy. Transpyloric tube placement or placement into the jejunum is used when physiologic condition warrant feeding the pt below the pyloric sphincter. Special Indications – anorexia, orofacial fractures, head and neck cancer, neurologic or psychiatric conditions that prevent oral intake, extensive burns and those who are receiving chemotherapy or radiation therapy. Procedure for tube feeding 1. Patient position – 30-45 degrees position. Head remain elevated for 30-60 mins 2. Patency of tube – Tube should be irrigated with water before and after each feeing to ensure patency. 3. Tube Position – Placement of tube is checked before each feeing or every 8 hours with continuous feeings. Checking methods; aspiration and pH. 4. Formula 5. Administration of feeding – feeing are given either by gravity drip method or by feeding pump. 6. General Nursing Considerations – daily weight, accurate I’s and O’s. Blood glucose check. Complication Related To tube and feeding - Vomiting and or Aspiration -...
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...diabetes Before you begin your teaching plan be sure to define the characteristics of the clinical site and patient population. The teaching plan should be customized to this population. This is a sample teaching plan that you can use and customize to your needs. You may want to design a pre-test and post-test to give your patients would are attending the teaching program. Based on statistics from the Centers for Disease Control website, 17.0 million people in the United States, approximately 6.2% of the population, have diabetes. Of this 17 million people, 11.1 million are diagnosed and 5.9 million are undiagnosed. In the different age groups, about 151,000 people less than 20 years of age have diabetes, approximately 0.19% of people in this age group. In the 20 and older age group 16.9 million and 8.6% of people have diabetes. The 65 and older age group has 7.0 million and 20.1% of all people with diabetes (www.cdc.gov/diabetes). The Identified Learning Need Patients with Diabetes have very comprehensive learning needs. The learning needs are focused on managing their glucose levels and preventing complications of diabetes. Learning needs for managing diabetes are complex and include: monitoring blood glucose levels, menu/food planning, exercise, medications, skin care, management of co-existing disease processes, knowledge of medications, knowledge of the disease process and how to manage hypo/hyperglycemic episodes. Many patients are diagnosed with diabetes every...
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...Before you begin your teaching plan be sure to define the characteristics of the clinical site and patient population. The teaching plan should be customized to this population. This is a sample teaching plan that you can use and customize to your needs. You may want to design a pre-test and post-test to give your patients would are attending the teaching program. Based on statistics from the Centers for Disease Control website, 17.0 million people in the United States, approximately 6.2% of the population, have diabetes. Of this 17 million people, 11.1 million are diagnosed and 5.9 million are undiagnosed. In the different age groups, about 151,000 people less than 20 years of age have diabetes, approximately 0.19% of people in this age group. In the 20 and older age group 16.9 million and 8.6% of people have diabetes. The 65 and older age group has 7.0 million and 20.1% of all people with diabetes (www.cdc.gov/diabetes). The Identified Learning Need Patients with Diabetes have very comprehensive learning needs. The learning needs are focused on managing their glucose levels and preventing complications of diabetes. Learning needs for managing diabetes are complex and include: monitoring blood glucose levels, menu/food planning, exercise, medications, skin care, management of co-existing disease processes, knowledge of medications, knowledge of the disease process and how to manage hypo/hyperglycemic episodes. Many patients are diagnosed with diabetes every year and many...
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...Bad Bug Book Handbook of Foodborne Pathogenic Microorganisms and Natural Toxins Introduction Food safety is a complex issue that has an impact on all segments of society, from the general public to government, industry, and academia. The second edition of the Bad Bug Book, published by the Center for Food Safety and Applied Nutrition, of the Food and Drug Administration (FDA), U.S. Department of Health and Human Services, provides current information about the major known agents that cause foodborne illness. The information provided in this handbook is abbreviated and general in nature, and is intended for practical use. It is not intended to be a comprehensive scientific or clinical reference. Under the laws administered by FDA, a food is adulterated if it contains (1) a poisonous or otherwise harmful substance that is not an inherent natural constituent of the food itself, in an amount that poses a reasonable possibility of injury to health, or (2) a substance that is an inherent natural constituent of the food itself; is not the result of environmental, agricultural, industrial, or other contamination; and is present in an amount that ordinarily renders the food injurious to health. The first includes, for example, a toxin produced by a fungus that has contaminated a food, or a pathogenic bacterium or virus, if the amount present in the food may be injurious to health. An example of the second...
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... biochemistry, genetics, the study of nutrition is increasingly concerned with metabolism and metabolic pathways: the sequences of biochemical steps through which substances in living things change from one form to another. The human body contains chemical compounds, such as water, carbohydrates (sugar, starch, and fiber), amino acids (in proteins), fatty acids (in lipids), and nucleic acids (DNA and RNA). These compounds in turn consist of elements such as carbon, hydrogen, oxygen, nitrogen, phosphorus, calcium, iron, zinc, magnesium, manganese, and so on. All of these chemical compounds and elements occur in various forms and combinations (e.g. hormones, vitamins, phospholipids, hydroxyapatite), both in the human body and in the plant and animal organisms that humans eat. The human body consists of elements and compounds ingested, digested, absorbed, and circulated through the bloodstream to feed the cells of the body. Except in the unborn fetus, the digestive system is the first system involved in obtaining nutrition. In a typical adult, about seven liters of digestive juices enter the digestive tract.[citation needed] These break chemical bonds in ingested molecules, and modulate their conformations and energy states. Though some molecules are absorbed into the bloodstream unchanged, digestive processes release them from the matrix of foods. Unabsorbed matter, along with some waste products of metabolism[examples needed], is eliminated from the body in the feces. Studies of nutritional...
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...- Release of Norepinephrine (cathecolamines) from adrenal glands and causes vasoconstriction. - Increase all bodily activity except GIT EFFECTS OF SNS - Dilation of pupils(mydriasis) in order to be aware. - Dry mouth (thickened saliva). - Increase BP and Heart Rate. - Bronchodilation, Increase RR - Constipation. - Urinary Retention. - Increase blood supply to brain, heart and skeletal muscles. - SNS I. Adrenergic Agents - Give Epinephrine. Signs and Symptoms: - SNS Contraindication: - Contraindicated to patients suffering from COPD (Broncholitis, Bronchoectasis, Emphysema, Asthma). II. Beta-adrenergic Blocking Agents - Also called Beta-blockers. - All ending with “lol” - Propranolol, Atenelol, Metoprolol. Effects of Beta-blockers B – roncho spasm E – licits a decrease in myocardial contraction. T – reats hypertension. A – V conduction slows down. Should be given to patients with Angina Pectoris, Myocardial Infarction, Hypertension. ANTI- HYPERTENSIVE AGENTS 1. Beta-blockers – “lol” 2. Ace Inhibitors – Angiotensin, “pril” (Captopril, Enalapril) 3. Calcium Antagonist – Nifedipine (Calcibloc) In chronic cases of arrhythmia give Lidocaine(Xylocaine) Parasympathetic Nervous System (CHOLINERGIC, VAGAL, SYMPATHOLYTIC) - Involved in fight or withdrawal response. - Release of Acetylcholine. - Decreases all bodily activities except GIT. EFFECTS OF PNS - Constriction of pupils (meiosis). - Increase salivation. - Decrease BP and Heart Rate. - Bronchoconstriction, Decrease RR. -...
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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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...LECTURE NOTES For Nursing Students Human Anatomy and Physiology Nega Assefa Alemaya University Yosief Tsige Jimma University In collaboration with the Ethiopia Public Health Training Initiative, The Carter Center, the Ethiopia Ministry of Health, and the Ethiopia Ministry of Education 2003 Funded under USAID Cooperative Agreement No. 663-A-00-00-0358-00. Produced in collaboration with the Ethiopia Public Health Training Initiative, The Carter Center, the Ethiopia Ministry of Health, and the Ethiopia Ministry of Education. Important Guidelines for Printing and Photocopying Limited permission is granted free of charge to print or photocopy all pages of this publication for educational, not-for-profit use by health care workers, students or faculty. All copies must retain all author credits and copyright notices included in the original document. Under no circumstances is it permissible to sell or distribute on a commercial basis, or to claim authorship of, copies of material reproduced from this publication. ©2003 by Nega Assefa and Yosief Tsige All rights reserved. Except as expressly provided above, no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without written permission of the author or authors. This material is intended for educational use only by practicing health care workers or students and faculty...
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...How to go to your page This eBook set contains two volumes. The main content pages are contiguously numbered: use the Table of Contents to find those page numbers. The front matter pages and indices are labeled with the Volume number and page separated by a colon. For example, to go to page vi of Volume 1, type Vol1:vi in the “page #” box at the top of the screen and click “Go”. To go to page vi of Volume 2, type Vol2:vi in the "page #" box… and so forth. Encyclopedia of Human Body Systems This page intentionally left blank Encyclopedia of Human Body Systems VOLUME 1 Julie McDowell, Editor Copyright 2010 by ABC-CLIO, LLC All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, except for the inclusion of brief quotations in a review, without prior permission in writing from the publisher. Library of Congress Cataloging-in-Publication Data McDowell, Julie. Encyclopedia of human body systems / Julie McDowell. p. cm. Includes bibliographical references and index. ISBN 978–0–313–39175–0 (hard copy : alk. paper) 1. Human physiology—Encyclopedias. I. Title. QP11.M33 2011 612.003—dc22 2010021682 ISBN: 978–0–313–39175–0 EISBN: 978–0–313–39176–7 14 13 12 11 10 1 2 3 4 5 This book is also available on the World Wide Web as an eBook. Visit www.abc-clio.com for details. Greenwood An Imprint of ABC-CLIO, LLC ABC-CLIO, LLC...
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