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DP_ chp4_prenatal
| Question | Answer |
|---|---|
| differentiation begins | after the 16-cell stage, |
| Germinal stage is | The first 14 days |
| a fourth crucial process after conseption is | Differential and begins after one cell duplicate and divide 16 times. |
| After one week, the mass of about 100 cells is called | a blastocyst |
| a blastocyst, forms two distinct parts | —a shell that will become the placenta -a nucleus that will become the embryo. |
| the first differentiation forms | The plecenta and the baby (embyo) |
| What embeds in the uterine wall | The plecenta |
| chromosomal or genetic abnormality can prevent | The implanting of the placenta in the uterus wall |
| Most new (prenatal) life ends | before an embryo stage begins |
| An early Miscarriage can be caused by | A chromosomal abnormality that prevents implantation of the germinal cell. |
| the first 10 days after conception the organism does not increase in size because | The blastocyst has not yet implanted to begin receiving nourishement from the mother. |
| The embryo stage is between | 14-56 days (3-8 weeks) |
| cephalocaudal development is literally | Growth and development that occurs from the head to tail. |
| An embryo is | The name for a developing human offspring, at the age of 3 weeks through 8 weeks after conception. |
| A “near-to-far” pattern of growth, with the extremities forming last is called | proximodistal (Proxim-o-distal) |
| Proximodistal development describes the | Growth or development that occurs from the center (core) in an outward direction, (e.g. spine to fingers). |
| At puberty, the feet of a young teenager grow first—the brain last reverses the | Proximinal growth patterns |
| At the end of 8 weeks the embryo has | All the basic organs and body parts (except sex organs) of a human offspring, |
| At 8 weeks the develpoment of self movement is | Inprecievable and random |
| Does deliberate movement occurs in early stages | No |
| The fetal period is | Between 9 weeks and birth |
| The name for a developing human offspring from the start of the 9 week after conception until birth is called | The Fetus |
| Prenatal growth is very rapid, with considerable variation, especially in | body weight. |
| 3 months, 3 oz., 3 in. imprecisely describes | The early growth of a fetus |
| Large body movements flexing and extending peeks at | 14 to 16 weeks, the 4th month |
| In the fourth month movement is evident | In all body parts “stretching, yawning, hand to face contact, swallowing and tongue protrusion". |
| Quickening is the fetus's | first palpable movement. |
| The middle three months develope | movement, stronger and faster Heartbeats while the fetus is awake and moving, Digestion and elimination develop, Central nervous system,Brain advanve toenails, and buds for teeth form, and hair grows, including eyelashes. |
| Brain advances by the end of mid pregnancy or 22 weeks is called | The age of viability when the fetus could live outside of the mother's body |
| Age of viability is reached | About 22 weeks after conception at which a fetus might survive outside the mother’s uterus if specialized medical care is available. |
| With specialized Medical Care the fetus could live outside of the human body | The age of viability or 22 weeks of development |
| Survival is | far from automatic |
| How can some very preterm babies survive | in an advanced neonatal unit, |
| Why is 22-week brain functioning so important | The survival of a preterm fetus requires it |
| Rumaisa Rahman was | One of the Tiniest, born after 26 weeks and 6 days, weighing only 8.6 ounces (244 grams). |
| twin sister, Hiba, who weighed 1.3 pounds (590 grams) at birth, had gone home | two months earlier. |
| The final Three months of pregnancy are called | Third trimester |
| Life outside the womb is possible, but Many babies born between 22 and 24 weeks die, due to loss of brain development, and survivors born before 27 weeks often have reached | the age of viability |
| prenatal life are awe-inspiring knowing one aspect is | A woman provides a home for a fetus better than the most advanced medical technology. (Nature over invention, paf). |
| 3 critical differences between life-and-death (or between a fragile, preterm newborn and a robust full-term one) in the preterm newborn are maturation of | The neurological, respiratory, and cardiovascular systems |
| In the third trimester the fetus gains at least --- pounds at Birth | 4½ to 7 1/2, (boys a few ounces heavier than girls). |
| Average birth weight | 7 1/2 lb |
| At 6 pounds or at 10 pounds the fetus is examined | more carefully to ensure that nothing is amiss |
| Europe and African cultures average heavier or lighter | Birth weights |
| Within an ecosystem where people survived best if they were tall or short is | selective adaptation |
| people who live in savannahs (open spaces with a few small trees) are relatively tall for | genetic reasons |
| What are a better indication of health than weight | Reflexes (brain development) |
| What are the three stages of prenatal development? 1 | |
| Why are the first days of life the most hazardous? | |
| What parts of the embryo form first? 3 | |
| When do sex organs appear? 4 | |
| What distinguishes a fetus from a baby? 5 | (Agenda) |
| What is the prognosis of a baby born before 25 weeks of gestation? 6 | |
| What occurs in the final three months of pregnancy? 7 | |
| The crucial factor to survival of a newborn | is maturation of the brain. |
| The first body system to develop is the | Central nervous system |
| Week 3, after conceptuin, some cells specialize to become neural progenitor cells, which duplicate and multiply many times until some of them create neurons (brain cells | neural progenitor cells, which duplicate and multiply many times until some of them create neurons (brain cells) |
| Neron cells | Do Not Duplicate, but are lifelong. |
| Name several brain parts | brain stem, cerebellum, hypothalamus, visual cortex, and so on |
| The different jobs of neurons include | Vision or seeing color or recognizing faces Etc |
| Neurogenesis begins during | Mid-pregnancy, the brain has developed billions of neurons. |
| The outer part of the brain is | The cortex |
| Describe the cortex | Cortex has six layers & the hippie hippocampus of the brain explodes in cell development in the develop proximodistal (near to far) like an onion skin. |
| The hippocampus of the brain explodes with new cell formation in the | Fourth month |
| the entire brain, each area follows a timetable that reflects specific brain function. | |
| Apoptosis, occurs in two prenatal waves are | Programmed cell death,1st Abnormal and immature neurons, die, later healthy nerons die, 1/2 newly formed will die before birth. |
| the various lobes and areas of the brain are established, and pathways between one area and another are forged | |
| At conception new DNA is formed by | The union of gametes (male female union as one) |
| Giri and sulfi are | Brain hills and vallies |
| Zygotes create | Stem cells |
| If the first monozygotic stem cells (Zygots) split completely | Twims are formed |
| Germinal, embyotic and fetal are stages of | Prenatal development of human offspring. |
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PAF2BFREE