Biology 198 Final Exam Questions and Answers Already Passed

Biology 198 Final Exam Questions and Answers Already Passed Defining Characteristics of Animals Multicellular Heterotrophic Eukaryotic Reproduce sexually Embryonic development Motile No cell wall Radial Symmetry Symmetry around a single axis that allows for multiple planes of symmetry. The Three Germ Layers Endoderm, Mesoderm, and Ectoderm. Tissue Types connective, muscle, nervous, and epithelial Coelem the body cavity located between the intestinal canal and the body wall. Segmentation Division of body into repetitive segments for the purpose of movement and specialization Cephalization the concentration of sense organs, nervous control, etc., at the anterior end of the body, forming a head and brain, both during evolution and in the course of an embryo's development. Tissue any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products. Organ a part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans. Organ System a group of organs that work together to perform one or more functions. Homeostasis the tendency toward a relatively stable equilibrium between interdependent elements, governed by positive and negative feedback. Negative Feedback A reaction that lessens a detected stimuli. Ex: If too much glucose is detected int the blood, insulin is released to reduce glucose levels. Positive Feedback enhances or amplifies an effect by it having an influence on the process which gave rise to it. Usually to complete a task. Ex: Child Birth Incomplete Digestive System Has one entrance/exit through which both food and waste are passed. Complete Digestive System Has one entrance through which food is passed and one exit through which waste is passed. Mouth Mechanical breakdown of food; begins chemical digestion of carbohydrates Salivary Gland Secretes saliva, which contains