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digestive system of amoeba

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From Yahoo Answers

Question:1. differentiate absorption and digestion 2. list the major organs of alimentary canal and associated structure of digestion and give the function of each 3. describe the 4 layers of the wall of digestive tract 4. discuss the digestive activities that occured in the mouth 5. describe the 3 main parts of the tooth

Answers:Are you trying to get someone else to do your homework for you?? How will you ever learn it, unless you look it up yourself!!

Question:I want the detail about working of human digestive system.

Answers:http://digestive.niddk.nih.gov/ddiseases/pubs/yrdd/

Question:hello.im in a hurry..so please help me with this.. 1.Organs that produces enzymes in the digestive system 2.What are those digestive enzymes 3.Function of those digestive enzymes.. thanks..

Answers:Digestive enzymes break down macromolecules In the mouth carbohydrate digestion starts. Salivary amylase (in spit) breaks down carbohydrates to simpler sugars (disaccharides and trisaccharides). The stomach initiates protein digestion. Pepsin (an enzyme) breaks down proteins to smaller polypeptides. HCl in the stomach disrupts cell membranes in food. Small intestine is where carbohydrate digestion is completed. Pancreatic amylase (from pancreas) finishes breaking down carbohydrates to simpler sugars (disaccharides and trisaccharides), while maltase (from small intestine) breaks down maltose (a disaccharide) to two glucose molecules. Sucrase (also from small intestine) breaks down sucrose to glucose and fructose and Lactase breaks down lactose to glucose and galactose. Protein digestion also occurs in the small intestine. Enzymes from the pancreas (chymotrypsin, trypsin, carboxypeptidase, elastase) break down proteins and polypeptides to short chain peptides, while pancreatic peptidase breaks down dipeptides and tripeptides to amino acids. Fat is also digested in the small intestine when bile (from the liver) emulsifies fats and lipase(from the pancreas) break down triglycerides to fatty acids and monoglycerides

Question:i have to write a paper about the digestion system. i have to pretend that i am a ham sandwhich and i have to tell how im traveled through the digestive system. what websites could i look at or where can i find something similer to the paper that i have to write

Answers:Digestion is the breaking down of foodstuffs in the body into a form that can be absorbed and used or excreted. It is also the process by which the body breaks down food into smaller components that can be absorbed by the blood stream,digestion begins when saliva is produced in the mouth and digestive enzymes are produced in the stomach.. The stomach continues to break food down mechanically and chemically through the churning of the stomach and mixing with enzymes. Absorption occurs in the stomach and gastrointestinal tract, and the process finishes with excretion. you can find it more with diagrams on these sites..

From Youtube

Nutrition In Amoeba :Check us out at www.tutorvista.com Amoeba is a microphagous feeder, which means that it feeds upon small aquatic organisms like bacteria, flagellates, ciliates and minute food particles. When a hungry Amoeba approaches to some food particle, it produces out its pseudopodia in the form of food cup which engulf the food particle by turning into food vacuole. the food also contain some water. this complete ingestion. the next step is digestion which is faciliated by the lysosomes. A few lysosomes surround the food vacuole and get fused with the membrane to discharge their enzymatic contents(proteases, amylases and lipases)into it. Hence the digestion is intacellular. At this stage the vacuole becomes a digestive vacuole. It decrease in size as the water is withdrawn and its content first become acidic(pH 5.6) and then alkaline(pH 7.3). When the digestion is completed, the digestive vacuole membrane is drawn into numerous fine canals. the soluble food particles are passed into the canals and finally into the surrounding cytoplasm by micropinocytosis. the digested food, water and minerals are absorbed(absorption) into the cytoplasm and circulate in it, through cyclosis where the food is assimilated into new protoplasm or is oxidized to librate energy. the undigested food is egested by exocytosis at the rear end.

Digestive System :A simple animation on the digestive process and the digestive system. Watch what happens when food enters the mouth and mixes with digestive juices...watch, learn and enjoy.