Identify and describe the six major processes involved in gastrointestinal activity.
The six major processes involved in gastrointestinal activity include: ingestion (substance enter the oral cavity of the digestive track), mechanical processing (mastication consist of chewing/breaking down the substance and peristalsis consisting of involuntary contraction that assist the movement of food through the esophagus and intestinal tracts), digestion (chemical break down of substance into smaller fragments appropriate in absorption via the digestive epithelium), secretion (releasing of acids, buffers, water, enzymes, and salts from the glandular organs and epithelium of the digestive tract), absorption (moving water, vitamins, electrolytes, and organic
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Ghrelin is created by the stomach and is known, as a peptide released endocrine cells commonly found with in the stomach’s lining. Ghrelin is responsible in sending a message to the brain activating the hunger meanwhile deactivating the satiety cell. It counteracts leptin to increase metabolic efficiency to stimulate a person’s appetite. When your stomach begins to growl it is producing ghrelin. However, the other hormone coming from fat cells are responsible in creating leptin, which acts as a regulator, however, does quite the opposite of ghrelin hormone it turns on the satiety cell and turns off the hunger cell. In obesity fat cells are increasingly high resulting in high leptin levels. However, a combination of obesity and a high insulin levels may cause the stomach cells that produce ghrelin to turn off lowering the levels of ghrelin. Over a period of time with a high level of leptin can lead to the satiety cell becoming insensitive to leptin decreasing ghrelin levels resulting in hunger cells becoming hypersensitive to ghrelin. Although, the leptin levels are high and the ghrelin are low the hunger cells are on meanwhile the satiety cells are off (NCBI,
In 1994, Zhang et al discovered the Ob gene and the hormone leptin1. This brought about the idea that obesity might have genetic-related factors and may not simply involve lack of self-control and overeating in the individual. The Ob gene regulates the amount of body fat storage in the body2. When the Ob gene signals, the hormone leptin is secreted from adipocytes1 and it travels to the hypothalamus in the brain2. This signals the hypothalamus to induce a feeling of satiety2. In other words, leptin secretion causes the stomach to feel full and ceases the necessity for eating. Once this discovery was made, the idea of obesity treatment came into play. If a hormone with satiety-inducing effects can be utilized for treatment then obesity may possibly become a null issue. Unfortunately this is an issue that still stands today – 20 years after the discovery of leptin.
As Dr. Ceballos explained it in lecture, the need for metabolic fuels is continuous, but food intake is episodic; consequently, energy intake and expenditure are never quite balanced. After a meal, there is a surplus of energy that must be stored for later use (Ceballos 2016). The fat cells usually take on the storage duties and vicious cycle ensues. Eating more leads to surplus of energy that will get stored as fat. Additionally, there is a chance Bonnie’s condition maybe hormonal. The hormone PYY3-36 is released by intestinal cells. This small peptide level increases after a meal to lower the appetite (satiety) signal (Ceballos 2016). This PYY3-36 acts on hypothalamic appetite control mechanism. PYY3-36 is very low in obese people, causing them to feel hungry. Dr. Ceballos discussed stress hormones such as cortisol. The release of cortisol can boost abdominal fat and may be the primary connection between stress and weight gain. Cortisol is a glucocorticoid. These hormones, along with insulin, appear to be responsible for stress-related food cravings (McLaren Health
Irregular bowel movements or constipation is quite a major and common concern in adults and babies as well. The condition becomes more challenging when it comes to babies. Parents of infants worry when their infant’s bowel movement is not regular and clear as that causes formation of gas and stomach pain.
The digestive system, in organisms like the mink and human, is supposed to break down the food being eaten to transfer into energy. This energy helps other functions of the body that would in turn keep it alive. The digestive system includes organs such as the stomach, intestines, liver, etc. Digestion starts at the mouth, though.
4)Stomach: The stomach squeezes and mixes food with enzymes for hours before it releases the mixture into the small intestine.
The digestive system otherwise known as the gastrointestinal tract (GI tract) is a long tube which runs from the mouth to the anus. It operates to break down the food we eat from large macromolecules such as starch, proteins and fats, which can’t be easily absorbed, into readily absorbable molecules such as glucose, fatty acids and amino acids. Once broken down, these molecules can cross the cells lining the small intestine, enter into the circulatory system and be transported around the body finally being used for energy, growth and repair.
Metabolism factors affect obesity. They way one’s body might use energy is very diverse amongst humans. The weight one gain depends on one’s hormones and metabolisms and these factors are different in every person. The hormone that controls an individual’s hunger is called ghrelin. Gherlin stimulates hunger and bestows a feeling of satiety. Based on how an individual’s body is programmed, regulating one’s eating habits will help normalize one’s weight.
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).)
The whole purpose of your digestion system is to break down and absorb the energy and nutrients it needs from the food you eat. The sandwich, strawberries, and orange juice you have just consumed is going through this process right now! The process of digestion begins with ingestion, this is when you take a bite of what you have planned to eat. When you took a bite of your sandwich and strawberry slices you were essentially beginning the process of digestion. Second comes the job of your digestion, which is a much more time-consuming and complex process for your digestive system. It begins once you have began chewing your food. There are two known types of digestion, these include Mechanical digestion, which is when you “physically break down the food into smaller pieces”, for instance chewing a burger and having it result in several chunks, and Chemical Digestion which is when you chemically break down your food, such as eating a slice of br...
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
Ingestion is a process of consuming any product alimentary into our body. By nature the ingestion occurs through the mouth. The food we are ingesting pass throughout the stomach, where stomach acids and enzymes acting. The muscular in our stomach squeezes and mixes the food. After the food into our intestine.
Enterococcus faecalis is a genus of gram positive cocci and form short chains or are arranged in pairs. They are nonmotile, facultative anaerobic organisms and can survive in harsh conditions in nature. There are over 15 species of the Enterococcus genus but about 90% of clinical isolates are E. faecalis. E. faecalis is a nosocomial pathogen because it is commonly found in the hospital environment and can cause life-threatening infections in humans. It is a bacterium that normally inhabits the intestinal tract in humans and animals but when found in other body locations it can cause serious infections. The most common sites for E. faecalis infections are the heart, bloodstream, urinary tract, and skin wounds. Due to vancomycin-resistant Enterococci, many antibiotics have been shown ineffective in the treatment. In this paper, I will describe the ecology and pathology of E. faecalis; the antibacterial resistance; treatment; and, what you can do to prevent Enterococcus infection.
The Cruise lines from all over the world have been hit hard with outbreaks of the “Stomach Flu.” This concerning illness is known as gastroenteritis and it can be caused by a handful of different bacteria and viruses. However, according to the Centers for Disease Control and Prevention (CDC), the “norovirus is the most common cause of acute gastroenteritis in the United States.”(cite cdc overview). Cruise lines have taken large measures to prevent and contain the spread of the norovirus but the latest cruise ship, Royal Caribbean, has been greatly impacted by the norovirus with over 600 passengers infected.
Ulcerative colitis, or UC, is a chronic gastrointestinal disease that causes inflammation and ulcers in the lining of the large intestine. It causes ulcers in the colon and rectum. Ulcerative colitis is one of two forms of inflammatory bowel disease. In UC, the inflammation from the ulcers breaks down the lining of the colon and causes bleeding and discomfort in the abdomen.
The digestive system is very responsible for taking the whole food that people eat and turns them into energy and nutrients to allow the body to function, grow, and fix itself. The six primary processes of this system are ingestion of food, secretion of fluids and digestive enzymes, mixing and movement of food and waste throughout the body, digestion of food into small pieces, absorbing the nutrients, and the elimination of wastes. Ingestion is the first function of the digestive system, which is also known as the intake of food. The mouth is the reasoning for this process because through the mouth is the way food enters the body. The stomach and the mouth store food until your stomach is ready to digest the food that was just eaten. The reason why people can only eat a few times a day is because your body can only allow a certain amount of food depending on your body weight and type, and it cannot ingest more food than it can process at one time. The next step in Secretion, this happens in the course of the day. The digestive system secretes about 7 liters of fluid daily, but these fluids include saliva, mucus, hydrochloric acid, enzymes, and bile...