Human Anatomy & Physiology Version 8.0 Physioex Exercise 8 CHEMICAL AND PHYSICAL PROCESSES OF DIGESTION - ANSWERS Please note: I do not include the charts as you still have to do the experiments and print the data and graphs. Activity 1 What do tubes 2‚ 6‚ and 7 reveal about pH and amylase activity? Hint: What variable was changed in the procedure? a. maximum of amylase is at pH 7.0 (tubes 2 & 5‚ brownish red) and pH 9.0 showed little activity (tubes 6 & 7‚ green) Which pH
Premium Enzyme
Biology Form Four Digestion Digestion is the process by which food is broken down from complex insoluble substances into simple soluble substances. There are two types of digestion – chemical digestion and mechanical digestion. Mechanical digestion involves breaking up large pieces of food into smaller pieces. This provides a large surface area for the action of enzymes on food. There is no change to the chemical composition of food during mechanical digestion. Mechanical digestion occurs in
Premium Digestion Digestive system Nutrition
Hertig‚Kathleen(1) The Importance of Lipoproteins and How They Effect Our Body and Through Lifestyle Decisions How Cardiovascular Disease Can Be Prevented and or Controlled. Insoluble in water lipids can be defined. To move lipids like fatty acid‚ triacylglycerols‚ steroids and fat soluble vitamins within the blood plasma‚ a mover protein is needed. Moved from the adipose tissue to the muscle‚ heart and liver tissues by serum albumin are fatty acids. Moved by the retinol binding protein
Free Cholesterol Atherosclerosis Fatty acid
SYNTHETIC EXPLOITATION OF ENZYMES: BIOCATALYSIS IN ORGANIC SOLVENTS: FUNDAMENTALS ENZYMES IN ORGANIC SYNTHESIS 1. Enzymes catalyze a broad spectrum of reactions with high turnover numbers. Rate enhancements approach 1012 fold. 2. Enzymes may accept a wide range of substrates. 3. Enzymes are highly regio and stereoselective. 4. Enzyme reactions take place under mild conditions; this minimizes problems of isomerization and racemization. 5. Enzymatic processes are less hazardous and polluting
Premium Solvent Enzyme Acetic acid
DIGESTION IN THE MOUTH: Food is mechanically cut by incisors and canines‚ chewed by molars and premolars‚ and mixed with saliva by the tongue. The saliva has been produced by salivary glands‚ which pour it into the mouth through salivary ducts. This process of introducing food into the mouth is called ingestion. Chewing breaks food into smaller particles so that chemical digestion can occur faster. This cutting and mixing is called mastication. Moreover‚ food is chemically digested by salivary
Premium Digestion Stomach
drinking). The purpose of this is so the food can be cut into smaller pieces and saliva is added before it is swallowed. This is where the first enzymes start work. There are two enzymes found in the saliva of the mouth‚ salivary amylase and lingual lipase. Amylase breaks down dietary carbohydrates such as monosaccharides‚ disaccharide sugars and complex polysaccharides (starch). Monosaccharide’s can be easily absorbed into the bloodstream so the others need to be broken down into these before they
Premium Digestion Stomach Nutrition
duodenum around the same area; this organ is called pancreas. Pancreas is very important‚ as it secretes probably the most important digestive enzymes into the small intestine; break down. The main enzymes secreted by the pancreas for digestion are lipases for lipid/fat digestion‚ pancreatic amylase for carbohydrate digestion which continues the breakdown of the starch in the bread to a substance called maltose. As the food is further pushed along the small intestine it produces maltase which breaks
Premium Digestion Small intestine Digestive system
reaction. So enzymes can be used over and over again. The substrates fit into the enzyme like a key fits into a lock (3). Enzymes have other functions as well‚ for example enzymes play a big role in your stomach and intestines. Enzymes such as protease‚ lipase‚ and amylase can break up fat‚ oil and starches from our daily food. How Does It Work? Enzymes are proteins‚ which act with a given compound (the substrate) to produce a complex‚ which then forms the products of the reaction.(1)
Premium Enzyme
intestine) * The wall of the stomach is muscular and contracts rthymically to squeeze the food‚ mixing it and breaking it into smaller lumps Small intestine * pancreatic juice is secreted into the small intestine containing protease‚ amlyse and lipase so the three main groups of macromolecules * the wall of the small intestine secretes variety of other enzymes which digest other substances. Nucleases; secreted to digest DNA and RNA in foods. Because of the great length of small intestine‚ food
Premium Digestion Digestive system Small intestine
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue‚ salivary glands‚ pancreas‚ liver‚ and gallbladder).[1] In this system‚ the process of digestion has many stages‚ the first of which starts in the mouth. Digestion involves the breakdown of food into smaller and smaller components‚ until they can be absorbed and assimilated into the body. Chewing‚ in which food is mixed with saliva begins the process of digestion. This produces a bolus
Premium Digestion Digestive system Stomach