Mom Baby Exam 3: Newborn and
Family Care Pt. 1 questions n answers
2025/2026
what is the biggest physiologic adaptation after a newborn is born? - CORRECT ANSWER
✔✔respiration initiation
what changes occur to respirations during extrauterine life? - CORRECT ANSWER ✔✔movement
from fluid to air environments causes changes in chemical, mechanical, thermal, and sensory
factors that increases the need for respirations
what are the chemical factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔- an increase in PCO2 and decrease in PO2 occurs
- during labor contractions breathing air after birth balances these chemical factors
what are the mechanical factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔intrathoracic pressure changes after birth decreases pressure in the thoracic cavity
and allows lungs to expand
what are the thermal factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔environmental changes in temperature as the newborn enters extrauterine life
cause the newborn to take an intake of breath
what are the sensory factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔external stimulation of touching and rubbing leads to receptors signaling the need
to take a breath
, what is the function of surfactant? - CORRECT ANSWER ✔✔- lowers surface tension in the
alveoli
- decreased surface tension lowers the pressure required to keep the alveoli open during
inspiration and prevent collapse of alveoli during expiration
is surfactant present in the lungs of all infants? - CORRECT ANSWER ✔✔- no!
- surfactant is present in term infants (37-42 weeks)
- absent or decreased supply in preterm infants (increases work of breathing)
Fetal to Neonatal Circulation: - CORRECT ANSWER ✔✔....
what is the second most important important physiologic change after birth? - CORRECT
ANSWER ✔✔initiation of circulation
what are the changes that occur as the infant goes from fetal to neonatal circulation? -
CORRECT ANSWER ✔✔- shunts are functionally closed *after the first breath* (foramen ovale,
ductus arteriosus)
- increased pulmonary blood flow increases pressure in the left atrium, causing the functional
closure of the foramen ovale
- ductus arteriosus becomes functionally closed within 24 hours after birth and permanently
closes over weeks due to an increase in systemic pressure
- when the umbilical cord is clamped, the umbilical arteries, umbilical veins, and ductus venosus
are functionally closed and become ligaments
is fetal circulation the same as adult circulation? - CORRECT ANSWER ✔✔yes!
are newborn laboratory values the same in a newborn as they will be in an infant (weeks to
months after birth)? - CORRECT ANSWER ✔✔no! they go through laboratory value transitions
as they adapt to extrauterine life
Family Care Pt. 1 questions n answers
2025/2026
what is the biggest physiologic adaptation after a newborn is born? - CORRECT ANSWER
✔✔respiration initiation
what changes occur to respirations during extrauterine life? - CORRECT ANSWER ✔✔movement
from fluid to air environments causes changes in chemical, mechanical, thermal, and sensory
factors that increases the need for respirations
what are the chemical factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔- an increase in PCO2 and decrease in PO2 occurs
- during labor contractions breathing air after birth balances these chemical factors
what are the mechanical factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔intrathoracic pressure changes after birth decreases pressure in the thoracic cavity
and allows lungs to expand
what are the thermal factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔environmental changes in temperature as the newborn enters extrauterine life
cause the newborn to take an intake of breath
what are the sensory factors that increase the need for newborn respirations? - CORRECT
ANSWER ✔✔external stimulation of touching and rubbing leads to receptors signaling the need
to take a breath
, what is the function of surfactant? - CORRECT ANSWER ✔✔- lowers surface tension in the
alveoli
- decreased surface tension lowers the pressure required to keep the alveoli open during
inspiration and prevent collapse of alveoli during expiration
is surfactant present in the lungs of all infants? - CORRECT ANSWER ✔✔- no!
- surfactant is present in term infants (37-42 weeks)
- absent or decreased supply in preterm infants (increases work of breathing)
Fetal to Neonatal Circulation: - CORRECT ANSWER ✔✔....
what is the second most important important physiologic change after birth? - CORRECT
ANSWER ✔✔initiation of circulation
what are the changes that occur as the infant goes from fetal to neonatal circulation? -
CORRECT ANSWER ✔✔- shunts are functionally closed *after the first breath* (foramen ovale,
ductus arteriosus)
- increased pulmonary blood flow increases pressure in the left atrium, causing the functional
closure of the foramen ovale
- ductus arteriosus becomes functionally closed within 24 hours after birth and permanently
closes over weeks due to an increase in systemic pressure
- when the umbilical cord is clamped, the umbilical arteries, umbilical veins, and ductus venosus
are functionally closed and become ligaments
is fetal circulation the same as adult circulation? - CORRECT ANSWER ✔✔yes!
are newborn laboratory values the same in a newborn as they will be in an infant (weeks to
months after birth)? - CORRECT ANSWER ✔✔no! they go through laboratory value transitions
as they adapt to extrauterine life
