BISC 1404 Study Guide - Midterm Guide: Thymus, Bronchus, Glycogen
26 Apr 2017
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What are choanoflagellates: choanoflagellates- similar to collar cells in sponges, similar to protists, have similar cadherin proteins like in animals. Triploblastic- have a body derived from three embryonic layers (ectoderm, mesoderm, endoderm. Ecdysozoans molt exoskeletons or cuticles whereas lophotrochozoans do not. Chapter 33: an introduction to invertebrates: porifera, cnideria, platyhelminthes, mollusca, annelida, nemotoda, arthropoda, Caco3: annelida- have metameres, nemotoda- have cuticle to molt, pseudocoelomates, no circulatory system, arthropoda- have exoskeletons made of protein and chitin, jointed appendages. Chapter 34: the origin and evolution of vertebrates. Chapter 40: basic principles of animal form and function. What is the difference between direct and internal exchange: direct exchange- every cell is in contact and exchanging with the environment. Electrical impulses- cell signalling in neurons, very fast response. Endotherm- heat is produced internally by metabolic processes. Ectoderm- heat is provided by outside environment: homeotherm- relatively constant body temperature, poikilotherm- body temp varies with environment.
