Process Of Food Digestion Within The Gastrointestinal Tract Essays

Process Of Food Digestion Within The Gastrointestinal Tract Essays

Length: 1546 words (4.4 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

Name: Student Number:

1) Describe the process of food digestion within the gastrointestinal tract. In your answer, make sure to address the following questions: (19 marks total)

a) Where does chemical digestion begin? What is the first enzyme to access food that is ingested? What macromolecule does this enzyme digest? Where is this enzyme produced/secreted? (4 marks)

Both chemical and mechanical digestion begins in the mouth as food materials are broken down into more absorbable units. Food material is transported down the gastrointestinal tract though muscle contractions, a process known as peristalsis. An enzyme known as Amylase, whose main function is to break down carbohydrates, is produced in the salivary glands and pancreas and is the first enzyme to access ingested food materials. These digestive enzymes are called alpha amylase and pancreatic amylase respectively. The carbohydrates in question are broken down from larger disaccharides into smaller monosaccharaides. After salivary amylase breaks down food materials the bolus is moved down the esophagus through mechanical contraction and enters the stomach through the esophageal sphincter.

b) Does the stomach produce any enzymes or other factors that can be used to break down food? If so, what macromolecules do these factors digest and what cells produce these factors? (5 marks)

The stomach houses several specialized cell types with distinct functions. Among these cell types are mucous neck cells (which secrete mucus and bicarbonate), parietal cells (which secrete gastric acid or HCl and the intrinsic factor), enterchromatfin like cell (which secrete histamines), Chief cells (which secrete pepsin[ogen] and gastric lipase), D cells (which secrete somato...

... middle of paper ...

...ons which are removed by the lymphatic system for lymphatic digestion.

d) In what form are carbohydrates absorbed in the gastrointestinal tract? How are they absorbed? (2 marks)

In the gastrointestinal tract carbohydrates are absorbed as monosaccharides. To absorb glucose and galactose transporters are used. Amylase will break carbohydrates into disaccharides’, which will be broken down further into monosaccharides by enzymes associated with the intestinal epithelium (maltase, sucrose, lactase). These monosacharides will then enter into their respective transporters. Glucose and galactose are brought into epithelial cells using the Sodium Glucose Transporter, while the Glucose Transporter lets fructose enter down its own gradient. The monosacharides leave the cell on its opposite side to be transported into the bloodstream.

Total: /42

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

The Gastrointestinal Tract ( Gi Tract ) Essay

- 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....   [tags: Digestion, Stomach, Digestive system, Pancreas]

Better Essays
1482 words (4.2 pages)

Anatomy: The Gastrointestinal Tract Essay

- ... Doe to enjoy this disgustingly juicy burger. Taste buds are located near the back of the tongue but if you would like me to get technical with words, they are located at the posterior lateral area of the tongue. I can make a bet that some of you never knew that our tongue helps in the chewing, swallowing and ingestion of food while also helping clean our teeth. I know. Very weird right. Momentarily, we will begin accelerating downwards to the alimentary canal colliding in to various juices which actually contain enzymes....   [tags: alimentary canal, unhealthy food]

Better Essays
707 words (2 pages)

Gastrointestinal in an Infant: Case Study Essay

- In order to come up with a list of appropriate differential diagnoses, essentially I needed to carry out a good consultation, in the form of history taking and physical examination, with the purpose of obtaining as much relevant information and significant findings as possible. To do so, it was necessary that I communicated effectively with HG’s parents and obtained their consent prior to examining their child, as the patient, being an infant, understandably was unable to talk. In terms of medical informatics, I acquired additional information with regards to HG’s medical history from his medical records....   [tags: Healthcare, Testing]

Better Essays
1128 words (3.2 pages)

Gut Bacteria: How Can It Affect Weight and Health? Essay examples

- Enteric bacteria are major microorganisms that colonise human’s gastrointestinal tract- a long tube containing specialised sections such as the mouth, oesophagus, stomach, intestines, rectum and the anus. Gut bacteria make up approximately 95 percent of the total cells in the body, with the colon containing the densest microbial communities (Gibson, Rastall and Fuller 2008: 52). Human gastrointestinal tract consists of 100 different prokaryotic species, and with two bacterial species, firmicutes and bacteroicidetes dominating them (Brooker et al....   [tags: gastrointestinal tract, bacterium, gut flora]

Better Essays
1073 words (3.1 pages)

Essay on The Digestion System ( Gi ) Tract )

- The digestion system is also called the gastrointestinal (GI) tract, which is an open tube run from the mouth to the anus. It contains many different organs that have different jobs and function to help break down the food molecules into smaller molecules for our body to ingest and absorption nutrients, vitamins, eliminate toxic substances. The first digestion always takes place at the mouth by using teeth to chew or grand food into smaller molecules which make it easier for the digestion process....   [tags: Digestion, Stomach, Digestive system, Pancreas]

Better Essays
876 words (2.5 pages)

Essay on Barium Sulfate and the Gastrointestinal Tract

- Abstract Over the years barium sulfate has proven to be a successful contrast agent for examination of the gastrointestinal tract. Though the road to discovery was long and relentless at times, when it finally found its niche in medicine it was only to the advantage of the physicians and patients today. There are many new diagnostic tools in radiology today that have led to the questioning of barium studies’ place in medicine and whether it will remain there long. And to what cost it will take to keep barium around, only time will tell some say....   [tags: Gastrointestinal Tract, Radiology]

Better Essays
2028 words (5.8 pages)

Essay on The Digestive Functions Within The Human Body

- Cellular nutrition is the digestive functions within the human body. Without digestion the body is unable to make use of the foods an individual consumes until it has been broken down into smaller particles which can be dissolved in liquid (soluble particles). In the body there are two intestines known as the small and large intestine; in these intestines there are villi which are often described as finger-like structures (Herbalife STS, 2016). They work in the intestines to absorb all the nutrients from the foods an individual consumes....   [tags: Nutrition, Digestion, Small intestine, Obesity]

Better Essays
1255 words (3.6 pages)

The Process Of Digestion Starts Essay

- The beginning process of digestion starts as pizza enters the gastrointestinal tract through the mouth, where the oral cavities begin mechanically breaking down pizza by the cutting, ripping, and grinding actions of the teeth. As the pizza breaks down it is mixed with saliva; salvia contains salivary amylase, this converts the starches in carbohydrates into simple sugars. Therefore, as your saliva and rolling motion of the tongue turns the pizza into a soft, pliable ball called a bolus. As the bolus slides down into your throat (pharynx), this allows for you to swallow....   [tags: Stomach, Digestion, Digestive system]

Better Essays
937 words (2.7 pages)

The Digestive System Is Made Up Of The Gastrointestinal Tract Essay

- The digestive system plays a key role in bodily function. The digestive system is made up of the gastrointestinal tract. The gastrointestinal tract is made up of hollow and solid organs. The hollow organs are the mouth, esophagus, stomach, small intestine, and large intestine (including rectum and anus). The solid organs involved in digestion are the liver, pancreas, and gallbladder. Once something infringes upon a healthy digestive system, like Crohn’s Disease, damage may occur to multiple different organs in this system....   [tags: Digestion, Small intestine, Stomach]

Better Essays
1419 words (4.1 pages)

Essay on Practical Report - Infections of Gastrointestinal Tract

- Introduction :- Many children around the world , especially in third world countries suffer many bacterial infection of the gastrointestinal system as a result of lack of awareness and the spread of the disease in the less attention to hygiene and the environment . In order to explain this word gastrointestinal tract infection , especially the stomach and intestines , it can result from infection by bacteria or virus or other parasites (1) . Some of the causes of inflammation as a result of eating food poisoning , especially meat and eggs ....   [tags: Medical, Case Study, solution]

Better Essays
1030 words (2.9 pages)