CNUR 303: Unit 3 - The Newborn Exam
Questions and Answers with Verified
Solutions | Latest Updated 2026
What are the aspects of quick - Respiration
adaptation to newborn life? - Circulation
- Temperature regulation
- Sources of nourishment
- Establishment of parent-infant relations
How does the respiratory system - Newborn flooded with catecholamines
adapt to the first day of life? from
labour and birth, increasing fluid clearance
from
lungs
- After birth, chest wall recoils, creating
negative
intrathoracic pressure
- Air is sucked into lung fields, replacing
fluid
- After inspiration, exhalation creates
positive
intrathoracic pressure
What is normal lung function Production fo surfactant
dependent on?
What stimulates the intial transition Hypercapnia, hypoxia, and acidosis due to
into breathing? labour.
, Define periodic breathing Cessation of breathing for 5-15 seconds,
but no HR
or colour change.
What CVS changes occur when - Chemoreceptors sense changes in
the arterial
cord is clamped? oxygenation; continued breathing
- HR ranged from 120-180, then 110-160
after several
minutes of life
- Delayed cord clamping improves CVS
adaptation
Explain fetal RBC's Few in number but large in size, gradually
shifting
to more with smaller size.
How does the foramen ovale It closes due to increased left atrial
change pressure with
after birth? the newborn's first breath.
How does the ductus arteriosus Becomes functionally closed within hours
change after birth? of birth,
gradually atrophying and forming a
non-functional
ligament.
How does the ductus venosus Connects umbilical vein to IVC, closing
change after birth? within a few
days of birth.
Questions and Answers with Verified
Solutions | Latest Updated 2026
What are the aspects of quick - Respiration
adaptation to newborn life? - Circulation
- Temperature regulation
- Sources of nourishment
- Establishment of parent-infant relations
How does the respiratory system - Newborn flooded with catecholamines
adapt to the first day of life? from
labour and birth, increasing fluid clearance
from
lungs
- After birth, chest wall recoils, creating
negative
intrathoracic pressure
- Air is sucked into lung fields, replacing
fluid
- After inspiration, exhalation creates
positive
intrathoracic pressure
What is normal lung function Production fo surfactant
dependent on?
What stimulates the intial transition Hypercapnia, hypoxia, and acidosis due to
into breathing? labour.
, Define periodic breathing Cessation of breathing for 5-15 seconds,
but no HR
or colour change.
What CVS changes occur when - Chemoreceptors sense changes in
the arterial
cord is clamped? oxygenation; continued breathing
- HR ranged from 120-180, then 110-160
after several
minutes of life
- Delayed cord clamping improves CVS
adaptation
Explain fetal RBC's Few in number but large in size, gradually
shifting
to more with smaller size.
How does the foramen ovale It closes due to increased left atrial
change pressure with
after birth? the newborn's first breath.
How does the ductus arteriosus Becomes functionally closed within hours
change after birth? of birth,
gradually atrophying and forming a
non-functional
ligament.
How does the ductus venosus Connects umbilical vein to IVC, closing
change after birth? within a few
days of birth.
