PSY 330 – Exam 1 Study Guide |
Developmental Psychology | Verified
Questions and Answers for Early
Development and Research Methods
(2026–2027)
3 layers of cells - Answer✔️-Ectoderm (becomes the nervous system and skin)
-Mesoderm (becomes the skeleton, circulatory system, and other internal organs)
-Endoderm (becomes the digestive system, lungs, urinary tract, and glands)
2nd month of pregnancy - Answer✔️-Eyes, ears, nose, jaw, and neck form
-Tiny buds become arms, legs, fingers, and toes
embryonic stage - Answer✔️-NOT smooth or gradual
-very sensitive period
Cephalocaudal - Answer✔️-from head to toe (ex. learning how to sit up)
Proximodistal - Answer✔️-from inner to outer (ex. learning how to reach for
something)
spontaneous abortions most likely to occur during - Answer✔️embryonic stage
period of the fetus (9th week to end) - Answer✔️3rd month-Organs, muscles, and
nervous system start to become organized and connected
External genitals form (can determine gender)
Fingernails, tooth buds, and eyelids appear
2nd trimester (17-20 weeks) - Answer✔️-Movements can be felt by mother
-Neurons are in place for brain development
3rd trimester - Answer✔️Fetus may survive outside womb at 22-26 weeks (age of
viability) (22 weeks has a 5% chance of living and at 26 weeks its 85%)
, able to have an abortion up to - Answer✔️24 weeks
teratogens - Answer✔️any environmental agent that causes damage during the
prenatal period (drugs/alcohol)
-responsible for 70% of birth defects
types of teratogens - Answer✔️-Prescription and non-prescription drugs
-Tobacco
-Alcohol
-Radiation
-Environmental pollution
-Infectious disease
anoxia - Answer✔️- inadequate oxygen supply at birth
-Can lead to brain damage or Cerebral palsy
causes of anoxia - Answer✔️-Squeezing of umbilical cord
-Placenta abruptio: premature separation of placenta
-Placenta previa: placenta covers cervical opening
pre-term babies - Answer✔️Infants born 3 weeks or more before their due date
(can be at a very healthy weight)
small-for date infants - Answer✔️Below expected weight when length of
pregnancy is taken into account (severely underweight)
reflex - Answer✔️inborn, automatic response to a particular form of stimulation
(good test of the babies nervous system)
rooting - Answer✔️(when you touch the babies cheek they turn head and open
mouth/suck for nursing)
moro - Answer✔️(when startled or dropped, arms go outward then inward)
adaptive value - Answer✔️Reflexes that aid in survival
development of motor skills - Answer✔️tonic neck
Developmental Psychology | Verified
Questions and Answers for Early
Development and Research Methods
(2026–2027)
3 layers of cells - Answer✔️-Ectoderm (becomes the nervous system and skin)
-Mesoderm (becomes the skeleton, circulatory system, and other internal organs)
-Endoderm (becomes the digestive system, lungs, urinary tract, and glands)
2nd month of pregnancy - Answer✔️-Eyes, ears, nose, jaw, and neck form
-Tiny buds become arms, legs, fingers, and toes
embryonic stage - Answer✔️-NOT smooth or gradual
-very sensitive period
Cephalocaudal - Answer✔️-from head to toe (ex. learning how to sit up)
Proximodistal - Answer✔️-from inner to outer (ex. learning how to reach for
something)
spontaneous abortions most likely to occur during - Answer✔️embryonic stage
period of the fetus (9th week to end) - Answer✔️3rd month-Organs, muscles, and
nervous system start to become organized and connected
External genitals form (can determine gender)
Fingernails, tooth buds, and eyelids appear
2nd trimester (17-20 weeks) - Answer✔️-Movements can be felt by mother
-Neurons are in place for brain development
3rd trimester - Answer✔️Fetus may survive outside womb at 22-26 weeks (age of
viability) (22 weeks has a 5% chance of living and at 26 weeks its 85%)
, able to have an abortion up to - Answer✔️24 weeks
teratogens - Answer✔️any environmental agent that causes damage during the
prenatal period (drugs/alcohol)
-responsible for 70% of birth defects
types of teratogens - Answer✔️-Prescription and non-prescription drugs
-Tobacco
-Alcohol
-Radiation
-Environmental pollution
-Infectious disease
anoxia - Answer✔️- inadequate oxygen supply at birth
-Can lead to brain damage or Cerebral palsy
causes of anoxia - Answer✔️-Squeezing of umbilical cord
-Placenta abruptio: premature separation of placenta
-Placenta previa: placenta covers cervical opening
pre-term babies - Answer✔️Infants born 3 weeks or more before their due date
(can be at a very healthy weight)
small-for date infants - Answer✔️Below expected weight when length of
pregnancy is taken into account (severely underweight)
reflex - Answer✔️inborn, automatic response to a particular form of stimulation
(good test of the babies nervous system)
rooting - Answer✔️(when you touch the babies cheek they turn head and open
mouth/suck for nursing)
moro - Answer✔️(when startled or dropped, arms go outward then inward)
adaptive value - Answer✔️Reflexes that aid in survival
development of motor skills - Answer✔️tonic neck
