Parasitic Nutrition 21 May 2011 10:43 = organisms that live on or in another organism obtaining nourishment at the expense of the host and causing harm. Gut parasite (Taenia solium) = tapeworm Primary host = human (eat uncooked infected pork) Secondary host = pig (drainage channels contaminated by human faeces) Adaptations… - Suckers & hookers (attachment) - Body covering (immune responses) - Thick cuticle (inhibitory substances = enzymes) - Simple body systems (reproduction) - Very thin & large
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of large food molecules to smaller ones. When food enters the mouth‚ digestion of the food starts by the action of mastication‚ a form of mechanical digestion‚ and the wetting contact of saliva. Saliva‚ a liquid secreted by the salivary glands‚ contains salivary amylase‚ an enzyme which starts the digestion of starch in the food. After undergoing mastication and starch digestion‚ the food will be in the form of a small‚ round slurry mass called a bolus. It will then travel down the esophagus and
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Use of Anti-Aedes aegypti Salivary Extract Antibody Concentration to Correlate Risk of Vector Exposure and Dengue Transmission Risk in Colombia. Norte de Santander is a region in Colombia with a high incidence of dengue virus (DENV). In this study‚ we examined the serum concentration of anti-Aedes salivary gland extract (SGE) antibodies as a biomarker of DENV infection and transmission‚ and assessed the duration of anti-SGE antibody concentration after exposure to the vector ceased. We also determined
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Organization of the human body Human anatomy and physiology – study of the structure and function of the human body. Anatomy- the scientific discipline that investigates the structure of the human body. Physiology – The scientific discipline that investigates the process of functions of living things. 6 Structural levels 1. Chemical level – atoms combine to form molecules 2. Cell level – Molecule form organelles 3. Tissue level – similar and surrounding material make up tissues
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tract by the following route: In the Mouth: Fat digestion starts off slowly in the mouth‚ with some hard fats beginning to melt when they reach body temperature. [pic] Role of Salivary Glands: A salivary gland at the base of the tongue releases an enzyme called lingual lipase that plays: • In Adults: A minor role in the digestion in adults. • In Infants: An active role in infants. In infants‚ this enzyme efficiently digests
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A 5 year old girl Jenny has presented to the Emergency Department with her mother‚ she is suffering from a variety of symptoms including wheezing and vomiting‚ a dry mouth‚ and a temperature of 39.7 degrees Celsius. Vomiting is when the person is excreting all food from there stomach via the mouth using forces from the oesophagus and stomach (Hockenberry & Wilson‚ 2007). The rationale for choosing this symptom is that vomiting is a clear sign that the body is trying to get rid of a pathogen‚ with
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The cardiovascular system The heart is a major organ in the body‚ this organ pumps blood around the body‚ through veins‚ capillaries and arteries. The blood carries oxygen to our cells and also carries waste products which include water and carbon dioxide‚ which are products of respiration. Blood also helps spread out salts‚ enzymes‚ urea‚ nutrients‚ hormones and heat across the body. The structure of the heart The heart is located between lungs and it is protected by the rib cage‚ it is thought
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1. Which of the following statements about the immune system is TRUE? A. Specific immune defenses are innate (pre-existing) B. Non-specific immune defenses are not innate: they are activated by exposure to foreign antigens C. Non-specific immune defenses require involvement of T-cells and B-cells D. Non-specific immune defenses include fever and the body’s inflammatory response E. None of the above 2. Which of the following does NOT occur during inflammatory
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Principles of Human Physiology‚ 4e (Stanfield) Chapter 20 The Gastrointestinal System 20.1 Multiple Choice Questions 1) Which of the following is NOT a basic process of the gastrointestinal system? A) digestion B) filtration C) absorption D) secretion E) motility Answer: B Diff: 4 Page Ref: 568 2) Which of the following is the correct order of the layers of the gastrointestinal tract wall‚ from lumen to external surface? A) mucosa submucosa muscularis externa serosa
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enzymes‚ therefore allowing chemical digestion to occur faster. The presence of the food in the mouth stimulates exocrine glands. This causes the mouth to secrete digestive enzymes‚ namely salivary amylase. These secreted enzymes aid in the breakdown of foods‚ officially starting the digestion process. Carbohydrates in particular are mostly broken down by salivary amylase. Salivary amylase breaks starch‚ a popular carb‚ down to maltose. This means that the bread of the ham and cheese sandwich will notably
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