BIOL 1202 : Rest Of Biology Exam 4
Document Summary
Concept 41. 41: an animal"s diet must supply chemical energy, organic molecules, and essential nutrients: chemical energy, organic molecules mostly supplied by carbohydrates, proteins, & lipids, other nutrients include vitamins and minerals. Essential nutrients: essential amino acids are ones that animals can"t synthesize, animals require 20 amino acids. Incomplete proteins: essential fatty acids are required in the diet. Vitamins organic molecules that serve as antioxidants and coenzymes. Minerals are inorganic elements or compounds in the diet. Concept 41. 2: the main stages of food processing are ingestion, digestion, absorption, and elimination. Ingestion: food brought in through the mouth: digestion: Chemical breakdown: digestive chemicals & enzymes breakdown food: absorption: small subunits transported out of digestive system, elimination: indigestible material expelled from body. Sponges are sedentary filter feeders with no specialized digestive system. Digestion takes place in collar cells lining waterfilled spongocoel (intracellular digestion) Clicker question: which of the following possesses a gastrovascular cavity: annelids, platyhelminthes , mollusks, arthropods.
