Achalasia

Achalasia

A) is a condition in which the lower esophageal sphincter closes more tightly during swallowing.
B) is a condition in the ruminant stomach which prevents the pyloric sphincter from opening and closing properly.
C) refers to the incomplete digestion of protein by ruminants.
D) is the protection from ingested toxins provided by the epithelium lining of the intestinal tract.
E) none of these.