i want answer for biology practical on rat's digestive system?
458423
Give a rat a Coke & it will die of not being able to burp!
683053
No.Certainly not.If your digestive system is working properly,your daily food will give you what you need. If it is not fuctioning well no supplement will work permanently.\nSo it is best to improve digestion.stick to wholesome diet.
1082518
one method that is safe and effective is to place pans of fresh coca cola in areas where the rats can drink it undisturbed. be careful, as this method will kill the rat: the carbonation in coca cola will cause death by distinsion, as a rat cannot burp or pass gas. good luck on your endevor. remember to put down fresh coca cola daily.
193015
Disaccharidases are produced in the brush border of the intestinal mucosa, so, the best answer appears to be 'B' - intestinal juice.\n\nGood luck!\n\nP.S. you have several of these questions on here.  The questions are either poorly conceived and/or the answers are poorly conceived - that is, things presented are not truly consistent with the information in medical textbooks (e.g. Guyton's "Medical Physiology" or Gropper's "Advanced Nutrition and Human Metabolism"), therefore you need to refer to your textbook or your class notes to see how this info. is being 'simplified'.  From these sources, hopefully, you will find the answers that best suit the teacher's thoughts.
1139099
This is shooting from the hip, I would double check this.....\n\nmouth\nesophagus\nstomach\nSmall Intestine\nLarge Intestine\n\nduring this path you will have help from saliva, the liver, pancreas to help break down and process foods, and remove toxins, etc.
606453
1. Draw and label a picture of the digestive system and trace the route that food takes through your body using a red crayon. (Hint: The picture at The Digestive System is a simpler to draw. You may want to use that site to get your drawing started.)\n \n2. Describe your digestive system. What mixes with the food when it is in the stomach? What does it do to the food? How long does food stay in each area? Share two interesting facts you learned about the digestive system.\n \n3. Draw a food pyramid and label it with the different food groups. Name the different categories of foods and how many servings a day you should eat.\n \n4. Below your food pyramid, list the food groups in a row across the paper. Under each food category list all the food you have eaten in that category for one whole day.\n \n5. Evaluate your eating habits. How did you do? What should you do differently to have a healthy body?
454602
a study was conducted on rats and what the researchers did was get the rats fat then starve them for a month, they lost weight, then the rats could eat as much as they wanted they got even fatter again, now the researchers starved them and the rats lost weight but not as much as the first time, then again the rats could eat as much as they wanted and then they were starved again, this time the rats didnt lose as much weight and they were heavier. What is going\non?? im not too sure however the fat cells  have a memeory and each time they r starved they remember to store more next time, it has to do with leptin and other responses from the fat cell, but basically u have yo yo dietied and your body is gonna make it harder for you to lose weight and keep it off it does not sound good but im sure if you seek good advice and are patient and change what you previously did good results can be achieved
480906
Structure is the actual physical makeup of the rat...the muscles...the bones...the cells and membranes, etc.\n\nFunction is how the rat's body uses it's structures and chemistry to perform the actions that make it and keep it alive....Functions are things like moving (using muscle and bone structure), breathing (using muscle, respiratory and circulatory structures), metabolism, reproduction, eating, etc.
681293
Don't worry. you can buy a physiology book. then buy a dead animal,  then anatomise it. just do it ,  success belong to you.  good luck!
227111
The digestion begins in the mouth. The teeth chew & grind the food, so they perform physical digestion. Next, the saliva contains ptyalin, which helps to digest starch into maltose sugar. the food then moves down the oesophagus.\n\nIn the stomach, the gastric juices are secreted, which contain Hydrochloric acid, pepsin (enzyme), gastric lipase and mucus. Pepsin digests proteins into peptones. Gastric lipase breaks down fat molecules. The partially digested food then goes into the duodenum. Here, bile and pancreatic juice are secreted. The pancreatic juice contains trypsin and pancreatic amylase. The bile emulsifies the fat. The trypsin digests proteins, while the emylase digests breaks down the starch. Finally, the walls of the ileum secrete succus entericus, which completes the digestion of carbohydrates into glucose, proteins into amino acids and fats into fatty acids.
693273
http://en.wikipedia.org/wiki/Parelaphostrongylus_tenuis\n\nMorphology\n\nRoundworms are triploblastic protostomes with a complete digestive system. Roundworms have no circulatory or respiratory systems so they use diffusion to breathe and for circulation of substances around their body. They are thin and are round in cross section, though they are actually bilaterally symmetric. Nematodes are one of the simplest animal groups to have a complete digestive system, with a separate orifice for food intake and waste excretion, a pattern followed by all subsequent, more complex animals. The body cavity is a pseudocoel (persistent blastula), which lacks the muscles of coelomate animals used to force food down the digestive tract. Nematodes thus depend on internal/external pressures and body movement to move food through their digestive tracts. The mouth is often surrounded by various flaps or projections used in feeding and sensation. The portion of the body past the anus or cloaca is called the "tail." The epidermis secretes a layered cuticle made of keratin that protects the body from drying out, from digestive juices, or from other harsh environments, as well as in some forms sporting projections such as cilia that aid in locomotion. Although this cuticle allows movement and shape changes via a hydrostatic skeletal system, it is very inelastic so does not allow the volume of the worm to increase. Therefore, as the worm grows, it has to moult and form new cuticles. The cuticles don't allow volume to increase so as to keep hydrostatic pressure inside the organism very high. For this reason, the roundworms do not possess circular muscles (just longitudinal ones) as they're not required. This hydrostatic pressure is the reason the roundworms are round.\nMost free-living nematodes are microscopic, though a few parasitic forms can grow to several meters in length. There are no circular muscles, so the body can only undulate from side to side. Contact with solid objects is necessary for locomotion; its thrashing motions vary from mostly to completely ineffective at swimming.\nRoundworms generally eat bacteria, algae, fungi and protozoans, although some are filter feeders. Excretion is through a separate excretory pore.\nReproduction is usually sexual. Males are usually smaller than females (often very much smaller) and often have a characteristically bent tail for holding the female for copulation. During copulation, one or more chitinized spicules move out of the cloaca and are inserted into genital pore of the female. Amoeboid sperm crawl along the spicule into the female worm.\nEggs may be embryonated or unembryonated when passed by the female, meaning that their fertilized eggs may not yet be developed. In free-living roundworms, the eggs hatch into larva, which eventually grow into adults; in parasitic roundworms, the life cycle is often much more complicated.\nRoundworms have a simple nervous system, with a main nerve cord running along the ventral side. Sensory structures at the anterior end are called amphids, while sensory structures at the posterior end are called phasmids.\n\nhttp://en.wikipedia.org/wiki/Nematode\n\n\nHope that helps!
803225
Think of whales. They have that siv-like stuff that strains krill and plankton stuff out of the water, to be swallowed and digested later.\n\nOk, now for a smarter explination: \n\nWhen humans eat, there's a lot more methods and reasons behind digestion than simply mechanical breakdown.\nFood starts in the mouth, where salivary amylaze, an enyzme, begins to break down starch. The mechanical process increases the surface area of the food, allowing a more rapid breakdown. Peristalsis moves food along the digestive track, partially digesting and absorbing along the way. In the stomach, chemicals from the gallbladder and pancreas are secreted to further breakdown food (with stomach fluid, "acid chyme"), and specifically protein (by enzyme "pepsin," thus the antacid medicine). This is known as "chemical digestion." Stomach muscles also aid in mixing digestive enzymes; this is what happens when your stomach lurches, bubbles (but gas can cause this also), "talks," or churns. Next, as food travels to the small and then large intestine, fat in food is absorbed in the small and water in the large.\n\nSpecies vary in the ammount of breakdown needed for their body to absorb nutrients. This describes the function of most. On the whole, animals besides humans use teeth to intimidate predators and capture prey. Some snakes swallow eggs whole, and would use teeth only to defend against the mother bird. The venus fly-trap captures flies and then disables them without teeth. Spiders don't have teeth, persay, but poisonous fangs which disable their prey--you may recall that they merely "suck" the liquids out of their food. \nAnimals equipped with other mechanisms besides teeth to capture prey have no need for them to digest.
510397
Metabolism \nglycogen storage\nplasma protein synthesis\ndrug detoxification \nproduces bile
698284
Mouth, esophagus, stomach, small intestine, large intestine, colon, rectum, anus are the parts the food or the waste from food travel through.  Side line contributors are glands such as\nsaliva glands, liver, gall bladder, pancreas.
30728
For digestive purposes.
309987
Depends on what you mean by efficient? Being that the purpose of the digestive system if to extract nutrients from food, how well it does that would be a measure of how efficient it was. Since the absorption of nutrients in the digestive system is dependent on the surface area of the intestines, if you were missing any of them you would be less efficient.
312172
They help keep you regular  :)\n\nActually this isn't just a joke.  Foods high in fiber take more time to digest and help "clean out" the system and remove stuff that might have been hanging around a while, especially in the large intestine where a lot of waste products get left behind.  It's very important later in life to keep your digestive system healthy, and regular, firm stool is a sign off good digestive health.\n\nAlso as the person below me points out, if your digestive system is healthy it's less likely to develop cancer, which can be particularly nasty down in that area.