Pharyngeal-esophageal
The sphincter that opens when food or fluids exert pressure on it is called the lower esophageal sphincter (LES).
The pyloric sphincter opens in response to the presence of food in the stomach. This triggers a reflex that relaxes the sphincter, allowing food to pass into the small intestine. The sphincter closes to prevent the backflow of intestinal contents back into the stomach.
The pyloric sphincter opens in response to the presence of acidic chyme in the stomach. This triggers hormonal and neural signals that stimulate the sphincter to relax and allow the chyme to pass into the small intestine. Once the chyme has been emptied, feedback mechanisms signal the pyloric sphincter to close to prevent backflow of contents into the stomach.
The pyloric sphincter opens in response to food entering the stomach. Stretch receptors in the stomach wall detect the food volume, signaling the sphincter to open and allow a controlled amount of chyme to pass into the small intestine for further digestion. Once the chyme has passed through, the sphincter closes to prevent backflow.
No, the sphincter and the epiglottis are not the same thing. The sphincter is a ring-like muscle that opens and closes to control the flow of substances in the body, such as in the digestive or urinary systems. The epiglottis is a flap of tissue that helps prevent food and liquid from entering the airway during swallowing by covering the entrance to the larynx.
The sphincter that opens when food or fluids exert pressure on it is the gastroesophageal sphincter. Closure of the sphincter is under the control of the vagus nerve.
The sphincter that opens when food or fluids exert pressure on it is called the lower esophageal sphincter (LES).
Esophageal, duodenal, urethral, and anal would all seem to fit that description.
the aorta that fluid that enters
sphincter
yes
at the level of the first lumbar vertebra
The lower esophageal sphincter keeps food from coming back up, or vomiting. When you have to vomit, the sphincter opens allowing the food to come back up. There is another sphincter, the pyloric sphincter which leads into the small intestine. Hope this helps!
The pyloric sphincter regulates passage of chymefrom the stomach
The internal urethral sphincter opens in response to signals from the autonomic nervous system, particularly the parasympathetic nervous system. This relaxation allows urine to flow from the bladder into the urethra for expulsion.
The pyloric sphincter is a valve that opens and closes to allow chyme to leave the stomach and enter the duodenum. The cardiac sphincter is a valve that opens and closes to prevent stomach acid from going up the esophagus.
The external anal sphincter is under voluntary control. You have the urge to defecate because your internal anal sphincter involuntarily opens, but you can keep yourself from going to the bathroom because your external anal sphincter is voluntarily closed. Hope that helps!