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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Chapter 5 Obtaining energy and nutrients for life CHAPTER REVIEW Key words absorption alimentary canal amylase anus autotrophic autotrophs bile bile duct bolus carnivores cellular respiration chloroplasts chyme colon cystic fibrosis digestion digestive system duodenum emulsification enzymes faeces foregut fermenters gall bladder gastric juice herbivores heterotrophic heterotrophs hindgut fermenters ileum jejunum lacteals large intestine liver mucus oesophagus omnivores pancreas pepsin
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b 0 How does the body obtain and utilise energy? Fueled fitness centre 0151 898 1643 The cardiovascular system The myocardium‚ commonly referred to as the heart‚ acts as a pump for transporting blood around the body via a collective system‚ known as the cardiovascular system. This system has various components; blood vessels; mainly arteries‚ veins and capillaries. The cardiovascular system has four main functions within the body. Firstly to transport
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BIOS256Week1Lab1EXERCISE Mechanical Digestion in the Gastrointestinal Tract Directions: a. Click the Contents button. b. Open the Digestive System File. c. Click Animations. d. Click Mechanical Digestion in the Gastrointestinal Tract. Introduction 1. Define the gastrointestinal tract (GI). The GI tract is the stomach and intestine divided up into the upper and lower GI 2. Identify three mechanical digestion activities. a. Chewing b. Mixing food and saliva with
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6 primary functions of digestive system: 1. Ingestion- food intake 2. Secretion 3. Digestion- mechanical & chemical breakdown of food Mechanical Mastication- first step. Enables mixing with saliva to form bolus to be swallowed. Regulated by CNS. Deglutition Mixing/Churning Peristalsis- movement of muscles within GI tract that facilitates movement of food Chemical- Hydrolysis (using H2O) of macromolecules into monomers (residues) carried out by digestive enzymes produced by salivary glands
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“The Difference between the Human Digestive System & the Digestive System of a Cow” Digestion is the mechanical and chemical breaking down of food into smaller components‚ to a form that can be absorbed‚ for instance‚ into a blood stream. Digestion is a form of catabolism; a break-down of macro food molecules to smaller ones. Digestion begins in the mouth‚ for a cow the teeth structure is very different from humans. Instead of having two rows of sharp incisors‚ cows have a single‚ bottom row
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SYSTEM The process of digestion can be fast‚ or can take some time depending on what a person has eaten. The time frame can also be affected by the person’s activity level. Food which is taken through the mouth is initially broken down by mechanical means. The teeth are responsible for grinding food‚ while the tongue assists the mixing of the food with saliva‚ which is secreted by the salivary glands‚ thereby initiating the chemical digestion of carbohydrates. This
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Essay Questions Exam 3 Chapter 40 a. Describe a key function of each of the four types of tissues found in animals. 1. Epithelial tissue (squamous‚ columnar‚ cuboidal) makes up the lining and coverings. This type of tissue is found in the skin (epidermis and dermis)‚ surrounding the organs of the body‚ and outer layer of capillaries (diffusion). 2. Connective tissue (loose‚ adipose‚ blood‚ fibrous‚ bone) holds organs in place and attaches epithelial tissue to other underlying tissues. A collagenous
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(no double bonds between carbons) * Solid at room temperature * Fat has higher energy density than other nutrients * Gross energy = (kcal/g) Volatile fatty Acids * Three fatty acids are the end product of carbohydrate digestion in the ruminant * Basically gases * Energy source for ruminants * 3 types: * Acetic * Propionic * Butyric Carbohydrates
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Ruminant Digestive System By Susan Schoenian sheep101.info |Why are sheep always chewing? | |Sheep belong to the ruminant classification of animals. Ruminants are characterized by their "four" stomachs and "cud-chewing" behavior. The cud is a food bolus | |that has been regurgitated.
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