BIO 126 Lecture Notes - Lecture 4: Gastrovascular Cavity, Salivary Gland, Choanocyte
9 Apr 2016
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Document Summary
Nutrient any substance consumed by an animal that is needed for survival, growth, development, tissue repair, or reproduction. Ingested organic macromolecules are used for two general purposes. To provide energy- used in synthesis of atp. All animals require the same fundamental organic macromolecules. These structures depend on how the organism take in food and how it digests food. Birds have a gizzard and a crop to allow them to quickly collect their food and hence avoid being exposed to predators for an extended period. However, all animals need the same building blocks to survive but the sources from which they get these macromolecules differs. Of the 20 amino acids that exists, only 8 required by many animals. They are: isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These amino acids cannot be synthesized by the organism"s body and hence have to be obtained from their diet.
