CHAPTER 4: Prenatal Development and Birth Flashcards
Cindy is doing a presentation on prenatal development and wants to include the three main periods of prenatal development in order from conception to birth. In which order should Cindy list the periods?
A) embryonic, germinal, and fetal
B) fetal, embryonic, and germinal
C) germinal, embryonic, and fetal
D) germinal, fetal, and embryonic
C) germinal, embryonic, and fetal
During the germinal period of prenatal development, cells take on distinct characteristics and gravitate toward particular locations. The term for this process is _____.
A) duplication
B) division
C) differentiation
D) specialization
C) differentiation
During the germinal period, the first task of the zygote’s outer cells is _____.
A) differentiation
B) duplication
C) germination
D) implantation
D) implantation
About _____ percent of natural conceptions never implant.
A) 10
B) 25
C) 50
D) 75
C) 50
About a week after conception, the outer layer of the multiplying cells forms a shell that will become the _____.
A) placenta
B) umbilical cord
C) embryo
D) infant
A) placenta
The germinal period ends approximately _____ after conception.
A) 2 days
B) 3 months
C) 2 weeks
D) 12 weeks
C) 2 weeks
Jenny just learned that she is six weeks pregnant. She is in the _____ period of prenatal development.
A) germinal
B) embryonic
C) fetal
D) second
B) embryonic
At the onset of the embryonic period, the _____ appears. It will eventually become the neural tube.
A) stem cell
B) spinal cord
C) primitive streak
D) placenta
C) primitive streak
As part of embryonic development, the neural tube will become the _____.
A) reproductive organs
B) intestinal tract
C) backbone, legs, and arms
D) central nervous system, brain, and spinal cord
D) central nervous system, brain, and spinal cord
The head begins to take shape in the _____ week after conception.
A) fourth
B) fifth
C) sixth
D) seventh
A) fourth
A pregnant woman is having an ultrasound done eight weeks into prenatal development. She is surprised by the size of the embryo’s head when she sees the image on the screen. The doctor reassures her that this is typical and that it is due to the _____ pattern of development.
A) proximodistal
B) cephalocaudal
C) neurogenesis
D) synaptogenesis
B) cephalocaudal
Johnny’s mom is four months pregnant. Johnny is eager for the arrival of the new baby and asks, “How many more months until I’m a big brother?” His mother says that he has to wait about _____ more months.
A) 2
B) 3
C) 4
D) 5
D) 5
What happens to the central nervous system during the fetal period of development?
A) it goes through a process of regeneration
B) synapses decrease in number
C) it becomes active, regulation heart rate and breathing
D) the number of neurons decreases
C) it becomes active, regulation heart rate and breathing
The age of viability is the time when the preterm newborn _____.
A) might survive outside the uterus
B) begins to move
C) will be born without defects
D) has developed all of its major organs
A) might survive outside the uterus
Harry was a preterm newborn who was born after 26 weeks of prenatal development. He is now a health, happy 2-year-old. Harry’s ability to survive after being born so early was due in part to his reaching the _____.
A) term of postnatal development
B) germinal period
C) neurogenesis point
D) age of viability
D) age of viability
The critical factor In attaining the age of viability is ____.
A) weighing at least 5 pounds (2.3 kilograms)
B) having adequate brain development
C) having functioning digestive and respiratory systems
D) surviving at least 28 weeks past conception
B) having adequate brain development
In a first birth, the average length of active labor is ____
A) several days
B) about 14 hours
C) about 8 hours
D) about 12 hours
D) about 12 hours
In the first stage of labor, the ___
A) cervix dilates to allow passage of the baby’s head
B) baby’s head moves into the birth canal
C) mother experiences intense contraction
D) placenta is delivered
C) mother experiences intense contraction
In the transition stage of labor, the ____
A) cervix begins to dilate
B) baby’s head moves into the birth canal
C) baby’s head moves through the birth Canal
D) placenta is delivered
A) cervix begins to dilate
In the second stage of labor, the _____
A) cervix begins to dilate
B) baby’s head moves into the birth canal
C) baby’s head moves through the birth canal
D) placenta is delivered
B) baby’s head moves into the birth canal
Most births in the United States take place in ____
A) birthing centers
B) hospital labor rooms
C) homes
D) pools of water
B) hospital labor rooms
An alternative to giving birth in a hospital is to arrange to give birth at home. In the United States, less than _____ of births occur at home.
A) 1%
B) 5%
C) 10%
D) 15%
A) 1%
When healthy babies are born, they usually ____
A) do not breathe on their own until the umbilical cord is cut
B) do not cry until the umbilical cord is cut
C) breathe and cry on their own immediately
D) breathe on their own, and cry when the umbilical cord I cut
C) breathe and cry on their own immediately
Which step is usually done immediately after birth?
A) mucus in the baby’s throat is removed
B) the baby is placed in a incubator
C) umbilical cord blood is drawn
D) the baby is assessed for eye color
A) mucus in the baby’s throat is removed