Chapter 4: Development Flashcards
When does development stop?
When we die
What are teratogens and what do they do ?
These are environmental agents that negatively impact human development. They can affect the physical development and the cognitive function even up do adult life.
What are some examples of teratogens?
these include alcohol, smoking, drugs, and certain medications
What kind of things do cognitive development psychologists study?
They would look at attention, language, and memory
What kind of things do social development psychologists study?
They would look at relationships and interactions between a child and his or her environment, such as sibling relationships and peer interactions
When does pregnancy begin and where does it occur?
When a sperm fertilizes an egg. fertiliziation occurs in the fallopian tube and the fertilized egg travels to and ultimately implants into the uterine lining.
When does the period of the zygote begin and when does it end?
It begins right after fertilization and goes until 2 weeks after conception
What marks this period?
Rapid cell division and the implantation of the blastocyst, a ball of dividing cells, into the uterine wall
What happens when the blastocyst implants itself in the fallopian tube/ why is it important for the pregnancy to occur in the uterus?
This results in ectopic pregnancy which can result in the rupturing of the fallopian tube and death if the woman does not terminate the pregnancy. The fallopian tube unlike the uterus cannot expand as the zygote grows and contract to expel the fetus out during childbirth
What is the difference between monozygotic and dizygotic twins?
Monozygotic eggs are indentical twins that formed as the result of one fertilized egg splitting into two while dizogtic twins are the reuslt of two eggs being released during ovulation and fertilized by different sperms. Monozygotic twins have the exact same genetic because they come from the same egg and dizygotic twins have different genetic makeup because they come from two differnt eggs
When does the period of the embryo begin? How long does it last?
After the fertilized egg implants into the uterine wall. It lasts from 2 weeks to 8 weeks, so 4 four weeks.
What marks the period of the embryo
the development of all the major organs. This is when the developing organims starts to have a human appearance
What principles of development are followed during the period of the embryo?
During this period the Cephalocaudal and Proximodistal principles of development can be observed. the first states that devlopment first occurs in the head and the brain before happening in the extremeties such as the hands and the feet, and the second states that development first occurs in the centre of the body such as in th eheart and the lungs before occuring in the extremteis as well.
What principle explains why embryos have larger heads than any other part of the body>
the Cephalocaudal deleopment principle
What and how long is the period of the fetus?
the fetus is the developing organism that can actually survive outside the uterine environment. it lasts 9 weeks after gestation until child birth