The lower esophageal sphincter is responsible for:
a. allowing chyme to enter the stomach.
b. preventing gastric contents refluxing into the esophagus.
c. adding digestive juices to the bolus of food as it descends the esophagus.
d. allowing intermittent amounts of stomach contents to enter the duodenum.
b
You might also like to view...
Which statement regarding an implantable port is true?
A. An implantable port can be self-placed by the patient. B. An implantable port is usually inserted into the arm and threaded to the vena cava. C. An implantable port must have the catheter changed every few hours to reduce the risk of infection. D. An implantable port may be difficult for the patient to access. E. An implantable port is only suitable for short-term access.
The term for the amount of niacin present in food—including the niacin that can theoretically be made from its precursor, tryptophan, present in the food—is ____________________.
Fill in the blank(s) with the appropriate word(s).
What is the composition of sucrose?
A) ?two fructose units B) ?one glucose and one fructose unit C) ?one glucose and one galactose unit D) ?one galactose and one fructose unit
Which of the following herbs are contraindicated when taking anticoagulant medications?
a. st. john's wort & echinacea b. ginko biloba & garlic c. ginseng & valerian d. ephedra & garlic