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How do ridges within the stomach aid in mechanical digestion?
They aid digestion in the same manner as dermal ridges aka: fingerprints aid in gripping. The same as ridges on the sole of a shoe aids traction.
How do the rugae within the stomach aid in the mechanical digestion?
The rugae are rough ridges in the stomach and provide a rough surface for food to be ground against.
How does mechanical digestion in the small intestine occur?
Mechanical digestion involves breaking down food molecules without changing the chemical nature of the molecules in the food. No chemical bonds are broken in mechanical digestion. Tearing forces (e.g. teeth) or muscular movements (e.g. the stomach) can assist mechanical digestion. Chemical digestion, which requires enzymes, involves breaking the bonds within food molecules and thereby producing products that are chemically different from the substrate (reactant). The smooth muscle layers of the small intestine are not set up for mechanical digestion. There are only two layers of smooth muscle in the muscularis externa of the small intestine: an inner circular layer and an outer longitudinal layer. These two muscles are ideal for peristalsis. In the stomach, however, there is an additional third layer in the muscularis externa (an oblique layer). These three layers can move the contents in the stomach around in many different directions. The stomach, therefore, is much better suited for mechanical digestion.
Is stomach mechanical or chemical digestion?
Both To further clarify: Mechanical: The stomach is a muscular sack. It contracts and relaxes, sloshing and squeezing the food inside to break it down and to ease the job of the 'chemicals'. Another example is how many birds swallow stones to enhance the crushing and churning in their stomachs. Chemical: The conditions and enzymes within the stomach contribute to chemical digestion. Hydrochloric acid, for example, creates an acidic environment that denatures proteins; whilst enzymes such as pepsin react at a molecular level with peptides to cleave them apart.
Is the stomach mechanical digestion or chemical digestion?
It is both: Mechanical: The stomach is a muscular sack. It contracts and relaxes, sloshing and squeezing the food inside to break it down and to ease the job of the 'chemicals'. Another example is how many birds swallow stones to enhance the crushing and churning in their stomachs. Chemical: The conditions and enzymes within the stomach contribute to chemical digestion. Hydrochloric acid, for example, creates an acidic environment that denatures proteins; whilst enzymes such as pepsin react at a molecular level with peptides to cleave them apart.
How is digestion a series of chemical reactions?
Digestion is a series of chemical reactions because the food is broken down and changed in physical properties and made into nutrients for the body to use as energy.
Contrast mechanical digestion with chemical digestion and give an example of each?
Physical digestion is, basically, "mashing." The food is ground up (by the teeth), mashed into a paste (by the stomach), and so forth. It's mixed with other foods in the process, but no new molecules are produced. Chemical digestion involves chemical reactions, and new molecules ARE produced. The action of enzymes in saliva, gastric juices, and so forth is a form of chemical digestion.
What is the mechenical digestion in the stomach?
There are three muscular layers within the stomach (longitudinal, transverse and oblique) that act to turn over and mix the food.
During the process of digestion at what point does the stomach begin to release chyme?
within 15 minutes of gastrin release
Suffix meaning digestion?
The suffix "-digestion" refers to the process of breaking down or absorbing food within the body, typically in the stomach or intestines. It is commonly used in medical terms related to digestion or digestive system disorders.
What organs of digestion chemically digest food?
Stomach
In what structure do proteases first act on food?
Proteases act on food within the stomach. They break down proteins into amino acids by hydrolyzing peptide bonds. This process is a crucial step in the digestion of proteins.
