Question

If you were explaining the absorption structures to someone who did not understand them, you might include all of the following except

A. Absorption of nutrients begins in the duodenum
B. Villi increase the surface area available for absorption
C. All absorption of nutrients takes place in the small intestine
D. Circular folds increase the surface area available for absorption

Answer 1

While the small intestine is the primary location for nutrient absorption thanks to the presence of villi and microvilli, it's incorrect to say that all nutrient absorption takes place there, as the process begins earlier in the digestive tract and continues in different parts.

Step-by-step explanation:

When explaining the absorption structures of the small intestine, one might mention that villi and microvilli increase the surface area for nutrient absorption, but it would be incorrect to state that all nutrient absorption takes place in the small intestine. Though the small intestine is indeed where the majority of nutrient absorption occurs, it is not the sole site. Some nutrients begin to be absorbed as early as the stomach, while certain vitamins, such as vitamin B12, are absorbed in the last part of the small intestine, the ileum.