Question

True or False

1. Bile is secreted into the stomach via the major duodenal papilla.

2. The mucosa of the GI tract creates muscle contraction to move and mix food.

3. The pancreas secretes bicarbonate into the small intestines to neutralize the acidic chyme.

4. In hemoglobin, oxygen binds to the globin parts of hemoglobin.

5. The left ventricle is positioned superiorly to the left atrium to allow blood to flow from left ventricle to left atrium.

Answer 1

1. False; bile is not secreted into the stomach rather it is secreted into the intestine.

2. True; the muscularis muscosa layer of the mucosa is composed of smooth muscles and contraction of these muscles causes segmental movement and mixing of the foods.

3. True; in addition to secreting digestive enzymes pancreas also secrete bicarbonate ion which makes pancreatic secretions alkaline. Thus, it neutralizes acetic chyme

4. False; oxygen binds with iron in the heam subunit of heamoglobin.

5. False; left ventricle is positioned inferiorly to the atrium which allows movement of blood from left atrium to the left ventricle.