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HDFS 3050 Exam 1 Questions with Verified Answers
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HDFS 3050 Exam 1 Questions with Verified Answers
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HDFS 3050 Exam 1 Questions withVerified Answers
Gametes - Answer-Sex Cells
Egg/Ovum - Answer-Female sex cell
1-2 Million eggs are made even before birth
400,000 survive to puberty
Every 28 days 1 egg is released
Sperm - Answer-Male sex cell
300-400 million sex cells made everyday
Travel through Cervix to uterus
500 survive to uterus
Fertilization - Answer-The union of egg and a sperm
Bind to egg cell
Egg will open one spot to let one sperm in
Zygote - Answer-Formed with after fertilization
Twinning - Answer-Happens in about 1 in 80 pregnancies
Dizygotic (DZ) or fraternal twins - Answer-Two ovam are fertilized and two different
zygotes are developed
3/4 of twins are DZ
Monozygotic (MZ) or identical twins - Answer-The fertilized zygote divides and splits into
two separate zygotes
Full Term (Gestation) - Answer-38 weeks
3 stages of prenatal Development - Answer-The Germinal/Zygotic Stage
The Embryonic Stage
The Fetal Stage
The Zygotic Stage - Answer-Timeline: Conception to 2 weeks
Zygote=fertilized egg
When the zygote reaches the uterine wall
After 36 hours the zygote starts to divide cells
The Umbilical cord forms
Umbilical Cord - Answer-Carries Nutrients
Exchange of Waste
, Delivers Blood and Oxygen
The Embryonic Stage - Answer-Timeline: 2-12 weeks
Embryo=implanted zygote
Indistinguishable from other species
Internal organs are formed
Appendages (limbs) formed
Nervous and Circulatory Systems are organized
Beginning of Heart Beat - Answer-4 weeks
The Fetal Stage - Answer-Timeline: 12-38 weeks
Resembles a human
Senses are apparent
Lanugo (hair all over body)
1st Kick Felt and Gender Apparent - Answer-18 weeks
Weight at 24 Weeks - Answer-2 pounds
Age of Viability (earliest baby can be born) - Answer-28 weeks
When does baby rotate to prepare for birth - Answer-36 weeks
Does learning occur in the womb? - Answer-Yes, Babies prefer mothers voice, mothers
language, "accents", taste preferences
Why does prenatal learning occur? - Answer-Serve as an early attachment mechanism
Orient the baby to the postnatal environment
Effect of Teratogens When Pregnant - Answer-Environmental agents that can cause
damage to the developing embryo/fetus
Tobacco Effects - Answer--Early Birth
-SIDS
-Heart and lung defects
-Miscarriage
Mercury Effects - Answer--Brain, hearing and double vision
-Memory defects
-Attention
-Language and motor skills
Found in fish, old thermometers and metal
Lead Effects - Answer--Miscarriage
-Hypertensions
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