What are the end products of digestion called,probiotics 2014 omics 14,what kind of yogurt contains probiotics - Step 3

The final step in digestion is the elimination of undigested food content and waste products. Diarrhea and constipation are some of the most common health concerns that affect digestion.
Pharynx and Oral Cavity Superior to the ORAL CAVITY is the HARD PALATE composed of the MAXILLARY and PALATINE bones.
Diagram of GI wall to show various kinds of glands -- some within the wall and some without (like the liver).
Tongue Tongue - skeletal muscle - skeletal muscle - mixes food with saliva into a compact mass known as a BOLUS.
Salivary Glands When you dissect your cat, you will notice two muscles on the inside of the cheek.
The parotid empties into the PAROTID DUCT which empties between the last two molars at the angle of the jaw. The Digestive System Function: physically and chemically breakdown food products so that they can be absorbed and transported to cells. Metabolism Chemical reactions of life – forming bonds between molecules dehydration synthesis synthesis anabolic reactions – breaking bonds between molecules hydrolysis digestion catabolic reactions That’s why they’re called anabolic steroids!
If a patient in a hospital was accidentally given an IV full of pure water they would be fine because pure water is neutral so it can’t hurt us. Cell (compared to beaker) ? hypertonic or hypotonic Beaker (compared to cell) ? hypertonic or hypotonic Which way does the water flow? Cellular respiration is only done by heterotrophs because autotrophs can make their own energy.
The purpose of fermentation is to produce a small amount of energy when cells don’t have access to oxygen.
Plants use water only as a means of keeping their cells full and holding the plant itself upright. The second step of photosynthesis is called the dark reactions because it only happens in the dark.
Light: absorption spectra Photosynthesis gets energy by absorbing wavelengths of light – chlorophyll a absorbs best in red & blue wavelengths & least in green – accessory pigments with different structures absorb light of different wavelengths chlorophyll b, carotenoids, xanthophylls Why are plants green?
Diagram how a gamete with 3 chromosomes could be produced with two maternal chromosomes and one paternal chromosome. Analogous structures ? Separate evolution of structures ? similar functions ? similar external form ? different internal structure & development ? different origin ? no evolutionary relationship Solving a similar problem with a similar solution Don’t be fooled by their looks! Convergent evolution Flight evolved in 3 separate animal groups – analogous structures Does this mean they have a recent common ancestor? Convergent evolution ? Fish: aquatic vertebrates ? Dolphins: aquatic mammals ? similar adaptations to life in the sea ? not closely related Those fins & tails & sleek bodies are analogous structures! Bird and bat wings can only be described as homologous structures, not as analogous structures. Food needs to be broken into smaller particles so that animals can harness the nutrients and organic molecules. It is important to break down macromolecules into smaller fragments that are of suitable size for absorption across the digestive epithelium.
The salivary enzyme amylase begins the breakdown of food starches into maltose, a disaccharide. Recall that the chyme from the stomach enters the duodenum and mixes with the digestive secretion from the pancreas, liver, and gallbladder.
The enzyme pepsin plays an important role in the digestion of proteins by breaking down the intact protein to peptides, which are short chains of four to nine amino acids.
However, the bulk of lipid digestion occurs in the small intestine due to pancreatic lipase. Constipation is a condition where the feces are hardened because of excess water removal in the colon.

It is often in response to an irritant that affects the digestive tract, including but not limited to viruses, bacteria, emotions, sights, and food poisoning. Digestion and absorption take place in a series of steps with special enzymes playing important roles in digesting carbohydrates, proteins, and lipids. OROPHARYNX -soft palate to epiglottis -soft palate to epiglottis -two sets of TONSILS -two sets of TONSILS a.
Absorption - transfer of the digested portion of food into the blood from the digestive canal. Note the crypts extending from the lumen, and the numerous, foamy goblet cells that populate the epithelium of the crypts.
When the mouth closes, the soft palate is pushed superiorly and closes the nasal passages A sphincter valve closes off the eustachian tubes The glottis closes and respiration stops. Digestive System Function of Digestive System: Ingestion of food Digestion Absorption of end-products Elimination of waste. Large, complex molecules of proteins, polysaccharides, and lipids must be reduced to simpler particles such as simple sugar before they can be absorbed by the digestive epithelial cells. As the bolus of food travels through the esophagus to the stomach, no significant digestion of carbohydrates takes place. Pancreatic juices also contain amylase, which continues the breakdown of starch and glycogen into maltose, a disaccharide.
In the duodenum, other enzymes—trypsin, elastase, and chymotrypsin—act on the peptides reducing them to smaller peptides. When chyme enters the duodenum, the hormonal responses trigger the release of bile, which is produced in the liver and stored in the gallbladder.
If the lipid in the chyme aggregates into large globules, very little surface area of the lipids is available for the lipases to act on, leaving lipid digestion incomplete. It is important to consume some amount of dietary lipid to aid the absorption of lipid-soluble vitamins. Recall that the colon is also home to the microflora called “intestinal flora” that aid in the digestion process.
This forceful expulsion of the food is due to the strong contractions produced by the stomach muscles. Elimination describes removal of undigested food contents and waste products from the body. Lipids are also required in the diet to aid the absorption of lipid-soluble vitamins and for the production of lipid-soluble hormones. In all cases, the epithelium lining the ducts and glands is continuous with the epithelium lining the lumen (cavity) of the gut. The disaccharides are broken down into monosaccharides by enzymes called maltases, sucrases, and lactases, which are also present in the brush border of the small intestinal wall.
Trypsin elastase, carboxypeptidase, and chymotrypsin are produced by the pancreas and released into the duodenum where they act on the chyme. By forming an emulsion, bile salts increase the available surface area of the lipids many fold. The semi-solid waste is moved through the colon by peristaltic movements of the muscle and is stored in the rectum. Many bacteria, including the ones that cause cholera, affect the proteins involved in water reabsorption in the colon and result in excessive diarrhea.
While most absorption occurs in the small intestines, the large intestine is responsible for the final removal of water that remains after the absorptive process of the small intestines.
Propulsion Peristalsis – alternate waves of muscular contraction and relaxation in the primary digestive organs.
In vertebrates, the teeth, saliva, and tongue play important roles in mastication (preparing the food into bolus).
The animal diet needs carbohydrates, protein, and fat, as well as vitamins and inorganic components for nutritional balance.

Further breakdown of peptides to single amino acids is aided by enzymes called peptidases (those that break down peptides). Emulsification is a process in which large lipid globules are broken down into several small lipid globules. The pancreatic lipases can then act on the lipids more efficiently and digest them, as detailed in [link].
As the rectum expands in response to storage of fecal matter, it triggers the neural signals required to set up the urge to eliminate. The cells that line the large intestine absorb some vitamins as well as any leftover salts and water. These are eventually broken down into MONOSACCHARIDES (simple sugars) CARBOHYDRATES are the major source of biochemical energy. While the food is being mechanically broken down, the enzymes in saliva begin to chemically process the food as well.
Other disaccharides, such as sucrose and lactose are broken down by sucrase and lactase, respectively.
Specifically, carboxypeptidase, dipeptidase, and aminopeptidase play important roles in reducing the peptides to free amino acids.
These small globules are more widely distributed in the chyme rather than forming large aggregates. These nerves come out in front of the ear from the STYLOMASTOID FORAMEN and branch across the face.
The combined action of these processes modifies the food from large particles to a soft mass that can be swallowed and can travel the length of the esophagus. Sucrase breaks down sucrose (or “table sugar”) into glucose and fructose, and lactase breaks down lactose (or “milk sugar”) into glucose and galactose.
Lipids are hydrophobic substances: in the presence of water, they will aggregate to form globules to minimize exposure to water.
These molecules can pass through the plasma membrane of the cell and enter the epithelial cells of the intestinal lining.
The two nasal cavities are separated by the NASAL SEPTUM which is formed by the union of the VOMER and PERPENDICULAR PLATE of the ETHMOID bones. The monosaccharides (glucose) thus produced are absorbed and then can be used in metabolic pathways to harness energy. Bile contains bile salts, which are amphipathic, meaning they contain hydrophobic and hydrophilic parts. The bile salts surround long-chain fatty acids and monoglycerides forming tiny spheres called micelles.
The monosaccharides are transported across the intestinal epithelium into the bloodstream to be transported to the different cells in the body. Thus, the bile salts hydrophilic side can interface with water on one side and the hydrophobic side interfaces with lipids on the other.
The micelles move into the brush border of the small intestine absorptive cells where the long-chain fatty acids and monoglycerides diffuse out of the micelles into the absorptive cells leaving the micelles behind in the chyme.
The long-chain fatty acids and monoglycerides recombine in the absorptive cells to form triglycerides, which aggregate into globules and become coated with proteins. They are very specific for each chemical reaction and the function to speed up the reaction.
Chylomicrons contain triglycerides, cholesterol, and other lipids and have proteins on their surface. Together, they enable the chylomicron to move in an aqueous environment without exposing the lipids to water.

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