Details Title: 250 Exam 1 Description: Prenatal Development Total Flash Cards: 20 Created: 01/23/2008 13:12:46		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Psychology Flashcards
Cards in this set: Term germinal period Definition 0-2 weeks fertilization to just before cell mass attaches to uterus wall   zygote, blastocyst Term implantation Definition when the blastocyst becomes imbedded into the uterus wall Term embryonic disk Definition cells on inside become new organism Term trophoblast Definition outer layer of cells will develop into life-support systems Term embryonic period Definition 2-8 weeks groundwork for all body structures and internal organs begins embryonic disk begins to form 3 cell layers (ectoderm, mesoderm, endoderm) Term ectoderm Definition outer nervous system, skin, sense organs Term mesoderm Definition middle muscles, skeleton, circulatory system, excretory system Term endoderm Definition inner digestive system, lungs, glands Term fetal period Definition 9 weeks - birth complex physical structures, organize and connect, external genitals formed, heartbeat audible, behavioral changes (suck thumb, make fist) Term vernix Definition white cheese-like substance protects skin from becoming chapped Term lanugo Definition white, downy hair helps vernix stick to skin Term age of viability Definition 22-26 weeks age at which fetus can survive if born early Term DeCasper and Spence Definition mothers read the cat in the hat and other stories after birth, infants played the stories responded to the cat in the hat more than other stories, possibly due to rhthym Term glia Definition support neurons do not conduct impulses can replicate throughout life Term migration Definition neurons travel on glia to their final destination Term synaptogenesis Definition forming of connections between neurons primarily make too many connections "pruning" process through experience Term risk factors for prenatal development Definition maternal nutrition intense emotional stress maternal age- complex relationships Term impact of teratogens based on several factors: Definition dose- duration and degree timing of exposure genetic predispositions presence of other factors Term types of teratogens Definition prescription and nonprescription medicine illegal drugs cigarette smoking alcohol infectious diseases (HIV/AIDS) environmental pollution (mercury) Term paternal factors Definition toxins can lead to abnormal sperm later age associated with some birth defects