Peristalsis.
the cardiac sphincter opens involuntarily during peristalsis, which is the process of wavelike muscle contractions of the alimentary tract that moves food along the oesophagus down to the stomach. :)
The two muscles are the lower esophageal sphincter (LES) and the pyloric sphincter. The LES prevents food from going back up into the esophagus, while the pyloric sphincter controls the flow of partly digested food from the stomach into the small intestine.
I can think of 5 off the top of my head. Cardiac Sphincter at the top of the stomach. Pyloric Sphincter at the distal end of the stomach. Ileocecal Valve that separates the Small and Large intestines and the Internal and External Anal sphincters.
Ligaments in the toes respond to serotonin released during coitus. Contraction is a involuntary response to this process.
The two anal sphincters are the internal anal sphincter, which is involuntary and made of smooth muscle, and the external anal sphincter, which is voluntary and made of skeletal muscle. Together, they help regulate the passage of feces during bowel movements.
Sphincters are muscular valves found throughout the body used to open or close an opening. An example is the cardiac sphincter which prevents food from coming back up the esophagus after swallowing
The anus can be affected by the internal and external sphincters, which are muscles that use tonic contracture to keep certain parts of the gastrointestinal tract closed, until it is time for something to pass. The internal sphincter is involuntary and what gives you the urge to defecate (have a bowel movement). The external sphincter is voluntary. This is what allows you to hold your feces - which was learned during potty training - until it is convenient to have a bowel movement. If the external sphincter continues to suppress the internal sphincter, it is possible that this could contribute to constipation.
one thing that can happen is that the muscle becomes weak and lets the acid through the muscle leading to the oesophagus. this happens because there's too much food in the stomach so it pushes out the acid.
No, defibrillation is not effective for treating asystole during cardiac arrest.
A pap smear cannot damage the bladder or its sphincter. The speculum may put some temporary pressure against the bladder. The sphincter is not affected at all.
Cardiac muscle or heart muscle is the part of the heart that fails to work during cardiac shock.
During peristalsis, the esophageal sphincter allows the food bolus to pass into the stomach. It prevents chyme, a mixture of bolus, stomach acid, and digestive enzymes, from returning up the esophagus. An overly loose esophageal sphincter leads to heart burn because the stomach acid "burns" the esophagus. An overly tight esophageal sphincter is known as achalasia and leads to pain on swallowing, regurgitation of food, and cheat pain.