Exercise 8: Chemical and Physical Processes of Digestion: Activity 1: Assessing Starch Digestion by Salivary Amylase Lab Report Pre-lab Quiz Results You scored 100% by answering 6 out of 6 questions correctly. 1. The substrate for amylase is You correctly answered: e. starch and carbohydrate. 2. Which of the following is true of enzymes? You correctly answered: c. Their activity can be affected by temperature and pH. 3. The reagent IKI tests for the presence of You correctly answered: a. starch.
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The digestive system is a combination of organs which have been arranged together to help carry out its particular function of turning food into the energy which is necessary to survive and packaging the excess residue for waste disposal. Digestion involves the breakdown of food into smaller components. The process of digestion has many stages with the first starting in the oral cavity. Within the system‚ food passes through a tube called the alimentary canal‚ more commonly known as the gastrointestinal
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Main food source/chemical composition Grass (fibre/starch) / sugars‚ proteins‚ oils‚ other nutrients Meat‚ bones / proteins‚ fats Nectar & pollen / High sugar content (sucrose‚ glucose‚ fructose)‚ carbohydrates Function of various structures within their digestive systems Four stomach chambers: Rumen – bacteria and protozoa break down cellulose. Reticulum - Once rumen is full goat regurgitates‚ the reticulum allows for this to happen. Omasum – bacteria and micro-organisms breakdown
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Digestive Systems in Different Animals Different species of animals have different digestive systems which are adapted to their unique requirements. The type of food‚ method of food gathering and energy needs are some factors that influence the type of digestive system an animal needs in order to survive. Herbivores have a more specialised digestive system than that of a carnivore because it is more difficult to digest vegetation than meat. The teeth are flat so that grass and plant material can
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down food into particles that can be used for nourishment. The stomach is not the only organ involved in the digestion process. A series of organs comprise the human digestive tract‚ including the mouth‚ esophagus‚ stomach‚ small intestines‚ liver and large intestine. Each organ in the digestive tract plays an integral part in the digestive process. The food enters the mouth‚ where it is masticated and prepped for digestion. The mouth is comprised of multiple features that contribute to the beginning
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Digestive system disorders Digestive system disorders can cause a lot of discomfort. Symptoms can include gas‚ diarrhea‚ constipation‚ cramps‚ nausea and vomiting. These common symptoms can have very different causes. These kinds of symptoms can make digestive disorders hard to diagnose. Celiac disease Celiac disease occurs when the body’s immune system reacts to a type of protein called gluten. If a person eats food that contains gluten‚ the immune system will gradually damage the lining of
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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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Cerebellum – coordination of movement and aspects of motor learning Cerebrum – conscious activity including perception‚ emotion‚ thought‚ and planning Thalamus – Brain’s switchboard – filters and then relays information to various brain regions Medulla – vital reflexes as heart beat and respiration Brainstem – medulla‚ pons‚ and midbrain (involuntary responses) and relays information from spine to upper brain Hypothalamus– involved in regulating activities internal organs‚ monitoring information
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heart and the resistance to blood flow in the vessels determines blood pressure. Resistance is determined by blood viscosity and by friction between the blood and the wall of the blood vessel. Blood pressure = blood flow x resistance. The Digestive & Intestinal System Each cell of the body requires a constant supply of nutrients to use
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What are the shapes and designations of the f orbitals? The exotic‚ complex f orbital shapes are rarely shown in textbooks. General (and organic) chemistry traditionally focuses on the lighter elements‚ but the forbitals aren’t occupied in the ground state until element 58 (cerium). Even for elements beyond cerium‚ the f orbitals are deeply buried beneath the valence shell and they rarely play an important role in chemical change or bonding. However‚ the orbital shapes can be useful in interpreting
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