NUR 106 MOD A STUDY GUIDE EXAM
WALLACE COMMUNITY COLLEGE
QUESTIONS WITH CORRECT
ANSWERS
Embryonic Period: WEEK 5 - ANSWER-Week 5
Head large b/c brain grows rapidly this wk.
Heart beating regular rhythm.
Beginning structures eyes/ears.
Some cranial nerves visible.
Muscles innervated.
Embryonic Period: WEEK 6 - ANSWER-Week 6
Head prominent /bent over chest.
Heart reaches final four chambered form.
Beginning formation of lungs.
Fetal circulation established.
Liver produces RBC.
Primitive skeleton forms.
Brain continues to develop-brain waves detectable.
Central nervous system forms.
Embryonic Period: WEEK 7 - ANSWER-Week 7
Straightening of trunk.
Nipples/hair follicles form.
Elbows/toes visible.
Arms/legs move.
Diaphragm formed.
Fetal heartbeat can be heard.
Mouth w/ lips and early tooth buds.
Embryonic Period: WEEK 8 - ANSWER-Week 8
Rotation of intestines.
Heart development complete.
Embryo has definite human form.
Facial features continue to develop.
Fetal Period - ANSWER-Begins 9 wks after conception & ends w/birth.
Period of growth & refinement in structure /function of organ systems .
Less vulnerable to teratogens.
Central nervous system vulnerable to damaging agents throughout pregnancy.
Fetal Period: Weeks 9-12 - ANSWER-Weeks 9-12
Head half total length of fetus-face/neck well formed.
Digestive system shows activity.
,Limbs long & thin-digits well formed.
1st movement begins, but too slight for maternal detection.
Eyes close at 9 wks- reopen at 26 wks.
Fetal gender may be determined by end of week 12.
Has buds for all 20 temporary teeth.
Sucking begins
kidneys begin to produce urine 12th week
heartbeat detected by doplar at 12th week
Fetal Period: Weeks 13-16 - ANSWER-Weeks 13-16
Lanugo develops.
Skin transparent.
Bones harder.
Head still dominant.
Sucking motions made with the mouth.
Amniotic fluid is swallowed.
Fingernails/toenails present.
Progressively gaining weight.
Movements strengthen & some women may feel "quickening".
Fetal Period: Weeks 17-20 - ANSWER-Weeks 17-20
Rapid brain growth.
Fetal heart tones w/stethoscope.
Vernix caseosa.
Eyebrows/ head hair appear.
Brown fat.
Muscles well developed.
Urine excreted in amniotic fluid by 20th week
fetus swallows urine by 20th week
Fetal movements typically felt by mother by 20th week
Fetal Period: Weeks 21-24 - ANSWER-Weeks 21-24
Eyebrows/lashes well formed.
Has hand grasp/startle reflex.
Continues growing/ gaining weight, but thin w/little SQ fat.
Skin translucent & red d/t capillaries close to its fragile surface.
Lungs begin to produce surfactant. around 24th week
Survival at end of this period is possible, but at high risk for multiple complications r/t
immaturity of all systems.
Fetal Period: Weeks 25-28 - ANSWER-Weeks 25-28
Length 15 inches.
Rapid brain development.
Nervous system controls some functions.
Fingerprints are set.
Eyes reopen.
Blood formation shifts from spleen to bone marrow.
Usually assumes head down position at this time.
, Progesterone - ANSWER-Acts on endometrium by relaxing uterine muscle -
prevents expulsion of blastocyst from uterus
Relaxes smooth muscles elsewhere
Slows emptying of stomach regurgitation, heartburn, constipation, nausea &
vomiting.
CNS influence listless, sleepy in early preg.
May be responsible for fat stores of mother in preg.
Thought to be necessary for breast development.
Estrogen - ANSWER-Growth and function of uterus in pregnancy.
Work with progesterone to cause breast development
Prepares genital tract for sperm migration secretions of cervix and vagina change
from thick to thin and watery (easier for sperm to travel)
**Important in birth control and infertility treatment.
Relaxes pelvic ligaments so the sacroiliac joints become limber and symphysis pubis
becomes elastic.
Babies develop how? - ANSWER-Cephalocaudal: head to toe
Central to peripheral: trunk to extremities
Simple to complex
General to specific
Embryonic Period - ANSWER-From beginning of 3rd wk through 8th wk after
conception.
Critical stage for organ development- by end of 8th wk all major organ systems in
place. Chromosomal defects can develop during this time that causes miscarriage or
certain fetal development to not form correctly
During the embryonic period organs are... - ANSWER-Developing rapidly / highly
vulnerable to teratogens. Such as specific drugs & diagnostic procedures, as well as
inadequate intake of beneficial substances such as folic acid. Also exposure to
cigarette smoke and polutents.
Embryonic Period: WEEK 3 - ANSWER-WEEK 3
May miss first menstrual period.
Brain, spinal cord, heart begins developing.
GI tract begins.
Neural tube forms-later spinal cord.
Leg/arm buds.
Teeth buds
Early heart begins beating at 21-22 days.
Embryonic Period: WEEK 4 - ANSWER-Week 4
Embryo folds at head & tail end-resembles c-shaped cylinder by end of 4th wk.
"Tail" apparent as brain & spinal cord develop more rapidly than other systems.
Neural tube closes.
Stomach, pancreas, and liver begin to form.
WALLACE COMMUNITY COLLEGE
QUESTIONS WITH CORRECT
ANSWERS
Embryonic Period: WEEK 5 - ANSWER-Week 5
Head large b/c brain grows rapidly this wk.
Heart beating regular rhythm.
Beginning structures eyes/ears.
Some cranial nerves visible.
Muscles innervated.
Embryonic Period: WEEK 6 - ANSWER-Week 6
Head prominent /bent over chest.
Heart reaches final four chambered form.
Beginning formation of lungs.
Fetal circulation established.
Liver produces RBC.
Primitive skeleton forms.
Brain continues to develop-brain waves detectable.
Central nervous system forms.
Embryonic Period: WEEK 7 - ANSWER-Week 7
Straightening of trunk.
Nipples/hair follicles form.
Elbows/toes visible.
Arms/legs move.
Diaphragm formed.
Fetal heartbeat can be heard.
Mouth w/ lips and early tooth buds.
Embryonic Period: WEEK 8 - ANSWER-Week 8
Rotation of intestines.
Heart development complete.
Embryo has definite human form.
Facial features continue to develop.
Fetal Period - ANSWER-Begins 9 wks after conception & ends w/birth.
Period of growth & refinement in structure /function of organ systems .
Less vulnerable to teratogens.
Central nervous system vulnerable to damaging agents throughout pregnancy.
Fetal Period: Weeks 9-12 - ANSWER-Weeks 9-12
Head half total length of fetus-face/neck well formed.
Digestive system shows activity.
,Limbs long & thin-digits well formed.
1st movement begins, but too slight for maternal detection.
Eyes close at 9 wks- reopen at 26 wks.
Fetal gender may be determined by end of week 12.
Has buds for all 20 temporary teeth.
Sucking begins
kidneys begin to produce urine 12th week
heartbeat detected by doplar at 12th week
Fetal Period: Weeks 13-16 - ANSWER-Weeks 13-16
Lanugo develops.
Skin transparent.
Bones harder.
Head still dominant.
Sucking motions made with the mouth.
Amniotic fluid is swallowed.
Fingernails/toenails present.
Progressively gaining weight.
Movements strengthen & some women may feel "quickening".
Fetal Period: Weeks 17-20 - ANSWER-Weeks 17-20
Rapid brain growth.
Fetal heart tones w/stethoscope.
Vernix caseosa.
Eyebrows/ head hair appear.
Brown fat.
Muscles well developed.
Urine excreted in amniotic fluid by 20th week
fetus swallows urine by 20th week
Fetal movements typically felt by mother by 20th week
Fetal Period: Weeks 21-24 - ANSWER-Weeks 21-24
Eyebrows/lashes well formed.
Has hand grasp/startle reflex.
Continues growing/ gaining weight, but thin w/little SQ fat.
Skin translucent & red d/t capillaries close to its fragile surface.
Lungs begin to produce surfactant. around 24th week
Survival at end of this period is possible, but at high risk for multiple complications r/t
immaturity of all systems.
Fetal Period: Weeks 25-28 - ANSWER-Weeks 25-28
Length 15 inches.
Rapid brain development.
Nervous system controls some functions.
Fingerprints are set.
Eyes reopen.
Blood formation shifts from spleen to bone marrow.
Usually assumes head down position at this time.
, Progesterone - ANSWER-Acts on endometrium by relaxing uterine muscle -
prevents expulsion of blastocyst from uterus
Relaxes smooth muscles elsewhere
Slows emptying of stomach regurgitation, heartburn, constipation, nausea &
vomiting.
CNS influence listless, sleepy in early preg.
May be responsible for fat stores of mother in preg.
Thought to be necessary for breast development.
Estrogen - ANSWER-Growth and function of uterus in pregnancy.
Work with progesterone to cause breast development
Prepares genital tract for sperm migration secretions of cervix and vagina change
from thick to thin and watery (easier for sperm to travel)
**Important in birth control and infertility treatment.
Relaxes pelvic ligaments so the sacroiliac joints become limber and symphysis pubis
becomes elastic.
Babies develop how? - ANSWER-Cephalocaudal: head to toe
Central to peripheral: trunk to extremities
Simple to complex
General to specific
Embryonic Period - ANSWER-From beginning of 3rd wk through 8th wk after
conception.
Critical stage for organ development- by end of 8th wk all major organ systems in
place. Chromosomal defects can develop during this time that causes miscarriage or
certain fetal development to not form correctly
During the embryonic period organs are... - ANSWER-Developing rapidly / highly
vulnerable to teratogens. Such as specific drugs & diagnostic procedures, as well as
inadequate intake of beneficial substances such as folic acid. Also exposure to
cigarette smoke and polutents.
Embryonic Period: WEEK 3 - ANSWER-WEEK 3
May miss first menstrual period.
Brain, spinal cord, heart begins developing.
GI tract begins.
Neural tube forms-later spinal cord.
Leg/arm buds.
Teeth buds
Early heart begins beating at 21-22 days.
Embryonic Period: WEEK 4 - ANSWER-Week 4
Embryo folds at head & tail end-resembles c-shaped cylinder by end of 4th wk.
"Tail" apparent as brain & spinal cord develop more rapidly than other systems.
Neural tube closes.
Stomach, pancreas, and liver begin to form.
