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CPPS 302 FINAL EXAM WITH
COMPLETE SOLUTION
Question :two circulations of fetus
Correct answer:1) fetoplacental
blood through the fetus to the placenta
uteroplacental
blood through from the mother to the placenta
Question :vital functions of the placenta
Correct answer:1) produces essential hormones
2) gas exchange 3) nutrient transport 4) fluid balance 5) waste removal
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Question :chorionic villi
Correct answer:These are finger like projections that form
the fetal portion of the placenta into the maternal blood to provide its essential roles
Question :maternal blood flow
Correct answer:1) spiral arteries (pulsatile spurts)
2) intervillous space (reduce force and velocity) 3) bathe chorionic villi 4) venous orifices 5) placental veins 6) uterine veins 7) intervillous space
Question :fetal blood flow
Correct answer:1) umbilical arteries (deoxygenated
blood) 2) capillary network (in chorionic villi) 3) diffusion of O2 and nutrients
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4) umbilical vein (oxygenated blood)
Question :in fetal blood flow the diffusion of O2 and
nutrients has a ______
Correct answer:thin diffusion distance
Question :how is fetal waste removed?
Correct answer:either by moving out of blood in placenta
or excreted into amniotic fluid
Question :fetal blood has a ____ pressure gradient
Correct answer:very low
Question :maternal PO2 entering the placenta
Correct answer:100mm Hg
Question :maternal PO2 inside intervillous space
Correct answer:30-35 mm Hg
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Question :umbilical vein PO2
Correct answer:~ 30 mm Hg
Question :fetal hemoglobin saturation
Correct answer:~ 85%
that is, at the same O2 levels fetal Hb will carry more O2 that that of adult Hb
Question :how is fetal hematocrit related to adult
hematocrit?
Correct answer:fetal has a much higher hematocrit
Question :The fetus has a _______ cardiac output and
heart rate than the adult, resulting in rapid circulation.
Correct answer:higher
Question :fetal blood circulation runs in _____, because
_____
Correct answer:parallel; the inputs and outputs of the two
sides mix