Dental Embryology Quiz 1 with correct answers

During development from fertilization to birth there are several stages. During which stage does most organ growth occur? CORRECT ANSWER fetal The pharyngeal arches first appear during the fourth week in utero. Each arch has structures associated with it. Which of the following gives the best description of the structures included in each arch during the embryonic period being careful to restrict your answer to only the embryonic period? CORRECT ANSWER cartilage, muscle, blood vessels and a nerve trunk If one is told that the hypoblast is present in a microscopic slide what stage of development was the subject in when prepared for the slide? CORRECT ANSWER bilaminar The blastocyst undergoes some changes after it implants in the uterine wall. Which of the following gives the most accurate order of formation of some of these structures? CORRECT ANSWER bilaminar disc > primitive streak > trilaminar disc Proliferation is an important process in the proper development of the embryonic tissues. Which of the following best illustrates the process of proliferation? CORRECT ANSWER Cells forming the outer layer of the tooth reproduce rapidly to create more cells to accomplish the task of forming tissues of the outer layer. In a developing human embryo how many germ layers are there? CORRECT ANSWER 3 During the period at which the developing human is in the morula stage it appears as CORRECT ANSWER a solid mass of cells Growth rates vary considerably in the prenatal period. When does the vast majority of the growth occur in the prenatal period? CORRECT ANSWER fetal