Abstract
Adult wistar rats of either sex housed in individual cages and fedad lib were used to investigate the effects of calorie content and taste on ingestion. A 15 min single-choice solution (water, quinine, sucrose, saccharin) test as well as 1 h mixed diet (stock diet, sucrose-mixed, saccharin-mixed, quinine-mixed) tests were used. Calorically-rich sucrose either in solution or in mixed-diet was preferentially ingested. Tasteper se has not influenced calorie intake, as intake on sweet saccharin (3.4 ±0.4 cal) or on bitter quinine (3.3 ±0.6 cal) was similar to intake on stock diet (4.8 ±0.8 cal). Increased 5 min intake on sucrose solution (4.6 ±0.1 ml) over intake of other test solutions (saccharin 3.5 ±0.2 ml, quinine, 1.2 ±0.3 ml, water 2.1 ±0.1 ml) and calorie intake suppression on 1 h stock diet immediately following sucrose solution intake, indicate rapid calorie metering, probably based on fast-acting specific gustatory signals
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