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A level biology revision digestive system
Digestive system question and answer
A level biology revision digestive system
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26. a) Identify the five unlabelled structures in the following diagram, indicated by the numbers 1 to 5. 1. Esophagus 2. stomach 3. duodenum 4. (ascending) colon 5. cecum b) Colon cancer patients often have surgery to remove all or part of the large intestine. Explain why it is important to have a functioning large intestine, and how your digestion would be affected if it were removed. A: The main job of the large intestine is to reabsorb water and salts from the undigested material and form solid waste. Without a functioning intestine, you could either have watery diarrhea, or if the colon was removed without a colostomy bag, your excess waste would slowly intoxicate your body due to it accumulating and not being able to be excreted. Your digestion would be affected because the time spent in the remaining intestine, if any, would be reduced or non-existent. This would lead to watery, frequent stools or the need for a colostomy bag. 27. The following graph relates the activity of a digestive enzyme to pH. a) Where in the digestive system would this type of environment be located? Stomach b) What is the optimal pH of this enzyme? 2 …show more content…
Pepsin and this works to break down proteins. 28. a) Explain the purpose of chemical digestion, and list three locations where it takes place. A: The purpose of chemical digestion is to break down the food into simpler nutrients that can be used. Locations include in the mouth with saliva, in the stomach by using enzymes such as pepsin to aid with protein digestion or lipase to aid with lipid digestion, and in the pancreas to secrete enzymes to break down protein, carbohydrates and fats. b) One of your friends has decided he must lose weight, while another has decided she is going to become a vegan. What advice would you give each of them about the foods they should eat, and how eating these foods would allow them to safely reach their dietary
I have to pull two alleles (two straws) from the bag to represent one fish because fishes like humans get two alleles one from their father and one from their mother.
Because it is a way of knowing the pressure that the blood is putting on the walls of arteries and veins.
Okay, if our lithium weight is going to be 6.941 g/moL Then that means we have to take 24.6g of Lithium and multiply it by 1 mol of Lithium over 6.941 g of Lithium. This would equal to be 3.544 mol of Lithium. Then we have to take that 3.544 and multiply it by 1 mol of hydrogen gas over 2 mol of lithium. Which would then equal into 1.772 mol of hydrogen gas. We can then figure out that 1.772 is our “n”. The “T” is our 301 Kelvin, the “P” is our 1.01 atm and the “R” is our 0.0820 which would be the L atm over mol k. And we can’t forget about our “V” which would be V equals nRT over P which equals 1.772 mol divided by 0.0820 L atm over mol kelvin multiplied by 301 kelvin over 1.01 atm which equals to our final answer of: 43.33 of H2
It is an attack by our best friends, …… and these attacks on mostly in randomly generated user name sites it was easy to short.
holds the record as the longest serving Representative in the history of the House of Representative. 84th – 115th his term from 1955 to 2015 were the dates of service.
The digestive process begins in the mouth, known as the oral cavity, where food enters. Chewing breaks the food into pieces that are more easily swallowed, while saliva mixes with food to dissolve food molecules. After that the tongue pushes food toward esophagus. The esophagus is a muscular tube extending from the pharynx to the stomach. By means of a series of contractions, called peristalsis, the esophagus delivers food to the stomach. The stomach secretes acid by tiny glands. At the same time that protein is being digested with the enzyme pepsin to break down protein into smaller molecules. Beside these muscles of the stomach contracts rhythmically to squeeze food. All the directions the food becomes thick liquid like milk shake. Then the food arrives in the small intestine from the stomach through the opening of the pyloric sphincter. The pyloric sphincter muscle is the furthest part of the stomach that connects to the small intestine. The food fully digest and absorp nutrients in small intestine with the aid of liver, gall bladder, pancreas. So the digestive system is very necessary for
Colon cleansing not only ensures a better chance of you to avoid colon cancers but also other diseases like the Crohn's Disease and
Digestion is defined as the process of transforming foods into unites for absorption. The Digestive System is a complex network of organisms that have six major processes: The digestion of food, the secretion of fluids and digestive enzymes, the mixing and movement of food and waste throughout the body, the digestion of food into smaller pieces, the absorption of nutrients, and the excretion of wastes (Inner Body (1).)
During digestion, the body breaks down food into smaller molecules that could then be used by the body’s cells and tissues in order to perform functions. This starts off in the mouth with the physical movements of chewing and the chemical breakdown by saliva. Enzymes in the stomach break food down further after traveling from the mouth through the esophagus. The food from here then moves into the small intestine, where pancreatic juices and enzymes dissolve proteins, carbohydrates, and fibers, and bile from the liver breaks down fats into these small molecules. Any portion of the fibers or food that were unable to be broken down are passed from the small intestine to the large intestine, which is where the digestive tract transitions into the excretory tract, then the colon and out of the rectum. Any liquids that have been stripped of their nutrients by the body proceed from the stomach to the kidneys. In the kidneys, sodium ions (Na+), uric acid, and urea are exchanged with water, which moves urinary bladder and is excreted through the
Digestion have a function of breaking down all food into our body. Our body use all nutrients to help in the process been health and growth. Digestion supplied small molecules that will be absorbed into our bloodstream.
Now the Cheetos have entered the stomach. The process of breaking down carbohydrates has already begun in the mouth and now more chemical and mechanical digestion will take place in the stomach. Once the bolus has entered the stomach, it mixes with gastric juice, starts protein digestion, and absorbs a limited amount. Here the chief cells secrete the inactive enzyme pepsinogen and the parietal calls secrete hydrochloric acid. When mixed together, they create pepsin. The pepsin works to breakdown the two grams of protein present in the Cheetos. Hormones are also present in the stomach and aid in the digestion process. The hormone, gastrin, increases the secretory activity of gastric glands. In the stomach, some salt from the Cheetos is absorbed through the wall. The Cheetos that entered the stomach has no...
Proper nutrition is important in maintaining a long and healthy life. Most Americans are rushed due to their busy work schedules, and do not take the time to plan their diets properly. Like me, most Americans are unaware of the importance of eating a healthy diet and consume too many foods without the proper nutrients. Throughout my life I have been fortunate. I have not had any major health problems, and have been able to consume most foods without having to worry about gaining weight. These last two years, however, I started to gain weight and have become concerned with my diet. Changing my poor eating habits has been difficult for me, however, having this assignment has taught me that it is not as difficult as I previously imagined.
The excretory system, which includes the rectum and anus helps the digestive system by getting rid of waste and the digestive system helps the excretory system by breaking down food to be eliminated from the body. Wow! The human body wouldn’t be able to work without one or the other. Anyways, I hope you enjoyed reading my journey throughout the human digestive system. I hope to write again from where my next journey from here will begin- perhaps it will be in the ocean or along Sydney Water pipes. Until next
The exocrine function of the pancreas is that it produces enzymes that aids in the digestion of food. There are three important enzymes that are crucial in helping with digestion. The first digestive enzyme is amylase. Amylase function is to break down carbohydrates. The amylase enzyme is made in two places: the cells in the digestive tract that produces saliva and the main one specifically found in the pancreas that are called the pancreatic amylase (Marie, Joanne; Media Demand, “What Are the Functions of Amylase, Protease and Lipase Digestive Enzymes”). The amylase in the pancreas passes through the pancreatic duct to the small intestines. This amylase in the pancreas completes the process of digestion of carbohydrates. Consequently, this leads to the production of glucose that gets absorbed into the bloodstream and gets carried throughout the body. The next enzyme that aids in digestion of food is protease. While amylase breaks down carbohydrates, protease breaks down protein. Protease breaks down protein into the building block form of amino acids. The three main proteases that it produces are: pepsin, trypsin and chymotrypsin (Marie, Joanne; Media Demand, “What Are the Functions of Amylase, Protease and Lipase Digestive Enzymes”). Pepsin does not occur in the pancreas but it is the catalysis in starting the digestion of proteins. Trypsin and chymotrypsin are the two proteases that occur in
The human digestion system is very complex. It starts with the mouth, salivary glands, pharynx, esophagus, stomach, liver, pancreas, gallbladder, small intestine, large intestine, then ends/exits with the anus. Each step is essential to the whole system. For example, the mouth chews food and mixes it with saliva produced by the salivary glands, and then the pharynx swallows chewed food mixed with saliva, this is followed by the food traveling through the esophagus to the stomach where the food gets a bath and mixes with acids and enzymes. After the stomach, the liver, pancreas, and gallbladder produce, stores, and releases bile and bicarbonates. Bile is produced in the liver and aids in digestion and absorption of fat while the gallbladder stores bile and releases it into the small intestine when needed. Following the process into the small intestine, this is where nutrients will be absorbed into the blood or lymph (most digestion occurs here). Next is the large intestine this is where water and some vitamins and minerals are absorbed. Finally, it is the end of the road, the anus. At...