These structures have been installed and operated for a number of reasons: 1  locks allow navigation on large rivers to facilitate boating traffic. 2  weirs create pool environments for diversion into irrigation channels, for pump intakes, recreational boating and swimming, and other aesthetic reasons.
Medical Definition of carbohydrate. : any of various neutral compounds of carbon, hydrogen, and oxygen (as sugars, starches, and celluloses) most of which are formed by green plants and which constitute a major class of animal foods.
Simple carbohydrates are composed of small molecules generally monosaccharaides and disaccharides, which are rapidly absorbed such as glucose and sucrose. Simple carbohydrates has a high glycemic index and increases blood glucose level rapidly resulting in high insulin levels and more hunger.oods rich in complex carbohydrates and fiber are called good carbohydrates. Simple carbohydrates include foods with added sugars -- these are called bad carbohydrates.