What structure prevents reflux of stomach contents?
a. Pepsinogen
b. Gastric mucosa
c. Upper esophageal sphincter
d. Lower esophageal sphincter
e. Duodenum
ANS: D
You might also like to view...
Which of the following is a true statement about the digestion and absorption of proteins?
A. Many whole proteins are absorbed by phagocytosis and enter the blood. B. Polypeptide chains are digested to yield individual amino acids, which can be absorbed into the blood. C. The products of protein digestion are first absorbed into the lymphatic system, which empties into the blood. D. Polypeptide chains are digested to yield dipeptides, which can be absorbed into the blood.
Drinking more water than normally needed will help prevent wrinkled skin
a. True b. False Indicate whether the statement is true or false
Which of the following dietary components would benefit heart health??
A) Soy products B) Plant stanols C) Omega-3 fatty acids D) Soluble fiber E) All of the above could benefit heart health.
Night blindness is associated with a clinical deficiency of ____
A) vitamin E B) vitamin A C) thiamin D) folic acid