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The pressure exerted by food on what valve causes it to open so that food can enter the stomach?
The lower esophageal sphincter. Actually it is triggered to relax by the nervous system as part of the swallowing reflex so the question is a bit overly simplistic if not just wrong.
What are ring like valves that keep body tubes closed off until it is appropriate to open for a moment?
Two of them are the pyloric valve, which opens and closes to let the contents of the stomach enter the small intestine, and the sphincter valve which opens to let the contents of the sigmoid colon move to the "outside world". Actually, "sphincter" is the general word for any such muscular ringlike valve.
Why can't you feel your stomach squeezing and opening?
You actually can. If you pay close attention the next time you burp, you may notice a 'relaxing' feeling deep in your belly. This is the lower valve, called the pyloric sphincter, opening to allow gas from your small intestine into your stomach, and then the upper valve, the esophageal sphincter, open and release the belch into your esophagus with the final result being your vocal cords in your larynx vibrating to make that familiar sound we all know and love as a burp!
What causes the gastroesophageal sphincter to open to allow food to enter the stomach?
the arrival of the peristaltic wave at the stomach
What makes the pyloric sphincter open and close?
acidic ph
What controls the passage of material from the small intestine to the large intestine?
There are structural (anatomical) and functional (physiological) ways the digestive system regulates how food is passed from the stomach to the small intestine. The major anatomical regulators are the pyloric sphincter (a muscular band that acts like a valve to open and close the connection between the stomach and small intestine) and the pyloric antrum (the part of the stomach commonly associated with stomach motility, mixing, and propulsion of stored foodstuffs into the small intestine). When the pyloric sphincter is relaxed and the antrum is active, food is propelled into the small intestine; when the sphincter is constricted and the antrum is relaxed, food is stored in the stomach. A number of physiological factors exist that regulate the activity of the pyloric sphincter and antrum. The principal regulators are nerves and hormones involved in the digestive process. The vagus nerve is an example of a nerve with major regulatory effects on motility of the stomach and small intestine. Gastrin and cholecystokinin (CCK) are gut hormones also involved in stomach motility. Gastrin is secreted in response to food (particularly amino acids, the building blocks of proteins) in the stomach and stimulates antral motility that serves to mix food. Strong antral contractions cause opening of the pyloric sphincter and the movement of food into the small intestine. CCK is released in response to foodstuffs (particularly fats) in the small intestine and inhibits antral motility of the stomach.
Which animal can take his stomach out?
There is no animal that can take its stomach out. It's impossible but there are some animals that can flip their stomachs inside out. One of those animals is the starfish. Another is the great white shark..Fun Fact: Starfish have two stomachs: the cardiac stomach and the pyloric stomach. The cardiac stomach is a sack like stomach located at the center of the body and may be pushed out of the body to engulf and digest food. Some species are able to force open the shells of clams and mussels by injecting their stomachs into the shells. With the stomach inserted inside the shell, the starfish is able to digest the mollusk in place. The cardiac stomach is then brought back inside the body, and the partially digested food is moved to the pyloric stomach. Further digestion occurs in the intestine.
What causes air sputtering after valve is open?
probably the O RING which is located under the spigot swivel
What is happening in the body when you vomit?
When a human vomits, the gastric valve, or the valve which controls when food may enter the esophagus and enter the stomach, become irritated or the nervous system causes it to open, even though no food is waiting to enter the stomach. Then, your stomach churns as it always does, except this time, when it churns, its contents travel upwards through the esophagus and into the mouth.
How do you open the tank valve on an oxygen cylinder?
To open the valve on an oxygen cylinder, you turn the valve.
What are possible causes for pressure coming out of the valve cover oil filler cap hole on a 97 Nissan pickup.?
the cap is open
How does pyloric sphincter knows to open for chyme and when to close?
It is a combination of hormones, brain signals, and sensor tissue near the sphincter.
