Abstract
The weight and length of the small intestine and the intestinal transport of sugars and amino acids were determined in Wistar rats fed diets containing either 54% starch or sucrose <i>ad libitum </i>or in meals. The relative weight and length of the small intestine were greater after meal feeding than after <i>ad libitum </i>feeding. Regardless of the pattern of feeding, transport of 1 m<i>M</i> glucose, 1 m<i>M </i>α-methylglucose, 5 m<i>M</i> fructose, and 30 m<i>M </i>sucrose was significantly greater in sucrose-fed rats than in starch-fed rats. The transport of 30 m<i>M </i>maltose, 30 m<i>M</i> lactose, 1 <i>mM </i>leucine, and 1 m<i>M</i> lysine was not affected by diet. The pattern of feeding employed neither generally affected the transport rates of the sugars or amino acids nor modified the greater sugar transport exhibited by the sucrose-fed rats.
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