Exam 2 Book Notes

Exam 2 Book Notes - Exam 2 Developmental Psychology Notes...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Exam 2 Developmental Psychology Notes Prenatal Development - Conception occurs when a single sperm cell from the male unites with an ovum (egg) in a female’s fallopian tube in a process called fertilization. - Germinal Period occurs from two to eight weeks after conception. Creation of the fertilized egg, cell division, attachment of the zygote to the uterine wall. - The group of cells now called the blastocyst consists of an inner mass of cells that will eventually develop into the embryo and the trophoblast, an outer layer of cells that later provides nutrition and support for the embryo. Implantation (attachment of the zygote to the uterine wall, takes place about 10 to 14 days after conception. - Embryonic Period occurs from two to eight weeks after conception. Support systems for cells form, and organs appear. Mass of cells is now an embryo and three layers of cells form. Endoderm is the layer of inner cells, which will develop into the digestive and respiratory systems. Ectoderm is the outermost later which will become the nervous system, sensory receptors (ears, nose, and eyes) and skin parts (hair and nails) Mesoderm is the middle layer, which will become the circulatory system, bones, muscles, excretory system, and reproductive system. o Organogenesis is the name given to the process of organ formation during the first two months of prenatal development. - Fetal Period begins two months after conception and lasts for seven months on average. 3 months after (fetus is 3 inches long and weighs 3 ounces) 4 months after (fetus is 6 inches long and weighs 4 to 7 ounces) 5 months after (fetus is 12 inches and weighs close to a pound) 6 months after (eyes and eyelids completely formed, fine layer of hair covers head) 7 months after (fetus is 16 inches long and about 3 pounds. Considered viable – able to survive outside the womb) 8 and 9 months after (fetus gains about 4 extra pounds). At birth (average American baby weighs 7.5 pounds and is 20 inches long) - EQUAL PERIODS OF 3 MONTHS ARE CALLED TRIMESTERS. o NOT THE SAME AS PRENATAL PERIODS Germinal and Embryonic periods occur in 1 st trimester Fetal begins towards the end of the first trimester and continues through the 2 nd and 3 rd trimester. - Hazards to Prenatal Development o Teratogen is any agent that can potentially cause a birth defect or negatively alter cognitive and behavioral outcomes. Teratogens include drugs, incompatible blood types, environmental pollutants, infectious diseases, nutritional deficiencies, maternal stress, advanced maternal and paternal age, and environmental pollutants. The dose, genetic susceptibility, and time of exposure to a particular teratogen influence both the severity of the damage to an embryo or fetus and the type of defect
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
o Psychoactive Drugs are drugs that act on the nervous system to alter states of consciousness, modify perceptions, and change moods Caffeine, Alcohol (Fetal Alcohol Syndrome), Nicotine, Cocaine, Methamphetamine, Marijuana, Heroin
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/16/2008 for the course PSYCH 10400 taught by Professor Scheibe during the Spring '08 term at Ithaca College.

Page1 / 14

Exam 2 Book Notes - Exam 2 Developmental Psychology Notes...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online