4. The esophagus is best described as:
a. A continuation of the rear of the mouth region which is just anterior to the
b. A structure with tubular muscular walls that has villi on the inner surfaces
which moves the food through an action called peristalsis.
A mass of lymphoid tissue that is located just anterior to the stomach.
d. A muscular, tubular structure that serves as a passageway for the food from
the pharynx to the stomach.
Which of the statements below best describes the digestion of fats?
a. Fats are emulsified by bile and bile salts in the small intestine and absorbed
as fatty acids in the large intestine.
b. Fats are emulsified in the stomach and then broken down to fatty acids,
monoglycerides, and glycerol which are absorbed in the small intestine.
Fats are emulsified by bile and bile salts in the large intestine and are then
absorbed as fatty acids and glucose through the intestinal mucosa.
d. Fats are emulsified in the stomach and are absorbed as fatty acids,
monoglycerides, and glycerol through the intestinal mucosa.
What is the major function of the liver (as far as digestion is concerned)?
a. The production of insulin.
b. The production of bile.
The production of fatty acids and monoglycerides.
d. The production of Vitamins A and B12.