Marcus has an infection that causes a temporary loss of villi. based on this information, you would expect marcus to while he has this illness.

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Explanation:

Villi are the finger-like projections in the wall of the small intestine. The presence of villi in the lining of the small intestine increases the surface area for absorption of the digested food. The small intestine is the site for the final digestion of all the nutrients. The simpler substances, produced by chemical digestion are then absorbed through the villi of the small intestine.

Once in the blood circulation, these nutrients reach various body cells. Cells use some of the nutrients as a source of energy while the excess ones are stored for future use.

Temporary loss of villi from the small intestine would disturb the process of absorption of nutrients. This would make the body cells to suffer from nutrients deficiency. The absence of energy sources in the form of nutrients would deprive the cells of energy as well. All these factors would lead to weight loss as the stored nutrients (fats, glycogen, proteins, etc.) would be used by body cells to meet the demand for energy.  

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